Database Develop

Magisk is consistently causing my Settings app to hang after booting

I have no proof of this, but this has been happening on my Note 4 (SM-N910T) ever since v13.3, and now on v14.0. I also bought a Huawei Honor 6X about a week ago, it's now happening there too. I didn't feel that this was worth posting about, figuring it might be device-specific or ROM-specific. But now that it's happening on 2 devices I've changed my mind.
Note 4:
Android 7.1.2 (CMRemix)
Xposed unofficial by PurifyOS (system mode)
Kernel sets SELinux to permissive on boot
Magisk v14.0
No Magisk modules installed
Honor 6X:
Android 7.1.2 (Resurrection Remix)
Xposed (systemless Magisk version)
Kernel sets SELinux to permissive on boot
Magisk v14.0
No Magisk modules installed
Description of the issue:
After powering on/rebooting, I can't open system Settings app for up to a minute or so. It just hangs on a white screen. It then either gives a message stating that Settings isn't responding, or, if I manually close Settings with the Recent button then try to reopen it, it repeats the same behavior but will eventually open. Sometimes I need to access Settings immediately after boot to make changes. Device is otherwise responsive, Magisk appears to work fine.
I have tried clean ROM installs on both devices, with full wipes beforehand, and latest stable Magisk. I've also tried with and without Xposed, results are the same. This didn't happen before v13.3, v11.x and v12.x didn't exhibit this behavior. But back this I was using systemless SuperSU in conjunction with Magisk. I suspect that MagiskSU may be the culprit.
MagiskSU is also noticeably slower (when compared to SuperSU or non-Magisk Phh's Superuser) at responding to SU requests, even with a setting of auto-grant and the lowest possible timeout (10 seconds), and global mount namespace. This may be due to the fact that does more than just rooting, it is logical to assume that it has more background processes running since it is also a systemless framework, whereas the other 2 solutions only manage root access.
Last, my file managers oftentimes won't let me delete/modify certain files/folders in the system partition, with a message like "device or resource busy", or flat-out denying access. System is remounted as RW. This only happens with Magisk, but never with SuperSU or Phh. I do use Magisk for systemless mods, but sometimes I want to make direct midifications to /system. Magisk, as a root solution, shouldn't be denying my ability to do this, since I own my devices, not Magisk.
Right now I'm primarily concerned with the Settings issue, but I figured the other issues are worth mentioning. I'm still on the fence, I may return to SuperSU, or Phh, trying Magisk again after a few more stable releases. But if this can be resolved then I'll give it another chance.
I'm posting the logs for my Honor 6X, one is the Magisk log from /cache, the other is /data/anr/traces.txt. Attempts to get a logcat during boot were unsuccessful.
Thanks for any help!

Magisk saves a log during boot that you might find useful. It's /data/magisk_debug.log. A logcat from when the device has booted up and you're trying to open up the Settings might also be interesting.
Have you tried on a stock ROM? Both those ROMs you're using are related and may have similar ROM specific issues...

dont open setting immediately after reboot. open it after a minute. not really a problem

It is not Magisk problem that cause this problem but it is the rom...i'm also using RR 7.1.2 on bacon and Magisk v14 and have no problem at all but we bacon user does encountered this problem in RR build in July and the devs fixed this on August build....
Sent from my A0001 using Tapatalk

@all: I've been super busy lately, not much time to post anywhere. But getting back to this.....I doubt this is a ROM issue. My reasoning is that it would occur with or without Magisk if that were the case. I don't get this issue when using SuperSU or non-Magisk Phh Superuser (regular). This only occurs when Magisk is installed, since v13.3, but not before that version. It has also occurred on Huawei stock EMUI firmware.
@24imelqui: Just because you don't consider something to be a problem doesn't mean it isn't a problem for others. I have a need to be able to access my Settings app immediately after booting. Your comment isn't useful in the least, if you can't post something helpful then don't post at all. /Ignored.....
@iPusak Gaoq™: isn't Bacon a Nexus device (not sure, never owned one)? Can you reference something where this has been reported? And fixed? Like something on XDA or GitHub or whatever? If this can be proven to be ROM issue then I'll post something to my devices' devs to see if it can be fixed in later releases.
I'm attaching several logs, this time a logcat as well. No such debug log exists in /data, and Magisk v14.0 has no options in the Manager app for debug logging.

AnonVendetta said:
@all: I've been super busy lately, not much time to post anywhere. But getting back to this.....I doubt this is a ROM issue. My reasoning is that it would occur with or without Magisk if that were the case. I don't get this issue when using SuperSU or non-Magisk Phh Superuser (regular). This only occurs when Magisk is installed, since v13.3, but not before that version. It has also occurred on Huawei stock EMUI firmware.
@24imelqui: Just because you don't consider something to be a problem doesn't mean it isn't a problem for others. I have a need to be able to access my Settings app immediately after booting. Your comment isn't useful in the least, if you can't post something helpful then don't post at all. /Ignored.....
@iPusak Gaoq™: isn't Bacon a Nexus device (not sure, never owned one)? Can you reference something where this has been reported? And fixed? Like something on XDA or GitHub or whatever? If this can be proven to be ROM issue then I'll post something to my devices' devs to see if it can be fixed in later releases.
I'm attaching several logs, this time a logcat as well. No such debug log exists in /data, and Magisk v14.0 has no options in the Manager app for debug logging.
Click to expand...
Click to collapse
There have been issues previously, where it seems like it's a Magisk thing but it's really a ROM issue. Some things Magisk does (and it does a few more things than just root your device) can sometimes bring problems out into the light...
I believe bacon refers to the OnePlus One (Nexus devices are all named after aquatic creatures). Looking in the RR thread over in those forums I'd guess you'll find your information somewhere around here: https://forum.xda-developers.com/on...tion-remix-t3507102/post73283623#post73283623
About your logs: I'm not too good at reading logcats, so no help from me there. But, I see something there in your Magisk log... Have you tried disabling Xposed?
There are things going on when a device with Magisk starts, so depending on your setup it might take a short while (30-ish seconds for me on my daily driver) before root requests start being accepted. If the ROM settings require root, that might be the reason why it won't open straight away when booting up your device.

OK, back again, Xposed disabled this time in the app (but still installed), so not active.

Here is the full changelog on the build where the devs fixed the issues on settings freeze/fc on startup....
https://forum.xda-developers.com/showthread.php?p=73304715
Sent from my A0001 using Tapatalk

[UNOFFICIAL][ROM]BETA LineageOS 18.1 for SM-T810 - June 9, 2023

LineageOS 18.1 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T810 ONLY​Model: SM-T810 (wifi) - gts210wifi - 9.7" screen, Exynos 5433 SoC, no LTE
This is the ONLY model that the ROM will work on.​
There is NO ROM for the T715 or T815 in this thread. Questions about T715 or T815 will be completely IGNORED.
You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
DISCLAIMER
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.
Before attempting to install this ROM
1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.
2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.
3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. DRM level 3 (SD definition)
10. deep sleep
What doesn't work
1. fingerprint. As I wrote in post 1891 at
https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725
I will not spend anymore time looking at fingerprint. If you need fingerpint to work, stay with stock Samsung rom.
2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.
3. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems such as the touch screen not working.
4. Possibly other features that I haven't tested or do not use.
Source Code
See FAQ 1 for links in post #2.
Thanks
1. LineageOS team for source code.
2. @retiredtab, @ananjaser1211, @lpedia, @Yogi555 and @CuckooPenguin for spending nearing 1 month fixing the 2 most biggest bugs in 17.1 that plagued users for nearly 10 months: the wifi instability and random reboots. These are discussed in detail at
https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308193/
https://forum.xda-developers.com/t/...rs-running-any-version-of-android-10.4308203/
3. All past contributors of the exynos5433 code.
4. @rINanDO for his lmkd spam fix in 18.1.
5. beta testers: lpedia, Yogi555 and CuckooPenguin
6. Yogi555 for building the public T810 monthly roms starting April 2022
7. lpedia for suggestions, proof reading and FAQ table format in post #2.

Frequently Asked Questions. You MUST READ this before posting any questions. Thank you.
QuestionAnswerQ1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.
Kernel
https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux
Device Tree
https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
https://github.com/retiredtab/android_device_samsung_gts210wifi
Vendor
https://github.com/retiredtab/proprietary_vendor_samsung-selinux
In addition, there is a repo diff file for device-specific tweaks needed to work and a roomservice.xml (local manifest file) file so you can build this rom yourself. The other patch required for tcp/ip is at https://github.com/DerpFest-11/pack...mmit/22fd53a977eeaf4e36be7bf6358ecf2c2737fa5eQ2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since mid August 2021 with no major issues.Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.Q5. What TWRP should I use?A5. You MUST use TWRP 3.5.2_9. Get it from
https://dl.twrp.me/gts210wifi/Q6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.Q7. Will you offer monthly updates with security patches?A7. We plan to do so. Yogi555 will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What works" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum. Having said that, @pflyaz has kindly make a guide in in post #16.Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.
To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:
Bash:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c then zip the problem.txt file
# before uploading it.
Q10. How long will you build 18.1 for this device?A10. For now, 18.1 will be built for all of 2022. After that, we will make a decision depending on a number of factors.Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. Under most circumstances, yes.
If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.
If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.
The ONLY exception is that if you are coming from LOS 18.1 with the April 5 2022 security patch or later, you can dirty flash the latest security patch build.Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps, OpenGapps, and MindTheGapps. OpenGapps is being removed as per post #14. Do your own research as to what is the most reliable gapps option for you.
I recommend installing the SMALLEST version of any of these, preferably with just the minimum Google services needed to access the Play Store and run apps that depend on Google services.
You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.
If you are going to install any Gapps package, follow the installation instructions given for that particular package.Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
Use a web browser with built-in adblock and privacy features, such as Brave.
Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
Look for apps that are open source, ad-free and lightweight.
Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.Q17. Will this ROM ever become official?A17. Never. Official maintainers have onerous responsibilities, and I know my device trees, code organization and git commits will NOT meet LineageOS standards. I'm not able or willing to take on the responsibilities and commit the extra time to supporting an official build.Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.Q19. Will there be any major 18.1 code modifications in the future?A19. I don't anticipate any major modifications. There may be some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done. This doesn't mean the code is perfect or well organized, but I won't be making any major changes.Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working. So I will NEVER build T715, T810 and T815.Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.
ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.
In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 800+ lines of code) have some errors.
If the device is rooted, this would further weaken the security.
With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.Q25. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the BETA rom?A25. Downloads are at
https://sourceforge.net/projects/retiredtab/files/SM-T810/18.1/

Monthly release notes
June 9, 2023 release notes
1. Incorporates June 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-06
May 9 release notes
1. Incorporates May 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-05
Apr 18 release notes
1. Incorporates Apr 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-04
Mar 19 release notes
1. Incorporates Mar 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-03
Feb 17 release notes
1. Incorporates Feb 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-02
Jan 11. 2023 release notes
1. Incorporates Jan 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-01
Dec 12 release notes
1. Incorporates Dec 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-12
Nov 21 release notes
1. Incorporates Nov 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-11
Oct 9 release notes
1. Incorporates Oct 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-10
Sept 11 release notes
1. Incorporates Sept 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-09
2. Fixes non working touchscreen and hardware buttons when powering up with power cable plugged in and device turned off. However, the recommendation is still to unplug your charger, wait 30 seconds before pressing power button when your device is turned off.
https://github.com/retiredtab/andro...mmit/7e0657629efedc7f06f6f6fb57199fca0b4e8ea6
https://github.com/retiredtab/andro...mmit/e17c44d2e282d67b243a1c99ce62127e83052c4f
3. Removed settings menu option for fast charging. S2 tablet devices do not support this.
https://github.com/retiredtab/andro...mmit/6db8e690141a98e5cf9e6952c3572c127c0cf8ea
Aug 10 release notes
1. Incorporates Aug 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2022-08
2. Fixes saving of color profile in live display during a reboot/shutdown.
https://github.com/retiredtab/andro...mmit/01b1ed6ba8c268a19762031415fde1b4e45d4ac3
3. Fixes offline battery charging by writing rules to allow charger to access certain files. This removes the previous workaround. Thanks to @simon-edwards for providing an adb logcat that showed the denials.
https://github.com/retiredtab/andro...mmit/041ae45960170e68410b059f4f709e9c14b79a99
July 13, 2022
1. Added argosd to improve wifi throughput as per https://github.com/retiredtab/andro...mmit/c181aa0c5192e46a5a03d4451e2648481a520c0f
2. Incorporates July 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-07
June 11, 2022
1. Removed vibrator code from gts2-common as wifi only models don't have vibrator motor (only LTE models).
https://github.com/retiredtab/andro...mmit/e54aee73a98e3cef6e74f96c1815cec9c82ff10d
https://github.com/retiredtab/andro...mmit/dd846b06378182398c55b57b2edc2537369bd509
2. Incorporates June 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-06
May 10, 2022
1. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
2. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05
April 10, 2022
1. YOU MUST read posts 1-4 if you haven't already
2. First public BETA release of selinux enforcing T810 build.
3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ.

Reserved.

Initial public build called lineage-18.1-20220410-UNOFFICIAL-gts210wifi.zip. The sha256sum file is provided as well to ensure integrity of download.
Yogi555 has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
April 10, 2022
1. YOU MUST read posts 1-4 if you haven't already
2. First public BETA release of selinux enforcing T810 build.
3. Incorporates April 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-04
4. BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA after as this is the first release of this build. You cannot dirty flash at all. See FAQ Q11.

Tried the beta build and everything seems to be working. I'll observe once it goes into deep sleep and see if WiFi will lose connection (usually 24 hours) on the other 18.1 build. Loaded all my paid apps without issues. Only gripe is the Netflix with DRM L3. Will look into another thread where they spoofed it.

I'll give it a try. Other LOS 18.1 roms wifi not working.

@retiredtab, @ananjaser1211, @lpedia, @Yogi555 and @CuckooPenguin thx very much for your work.
Until yesterday mine was on ripees build from 20211103 which was stable and working but didn't seem to get any further updates than 20211208.
Clean installation went well although I didn't follow "Q5" and used latest TWRP which is 3.6.1_9-0.
Flashed it with Magisk 23. (wanted to make sure that Gapps didn't interfere)
1st boot was fast, setting it all up.
Looking in settings for button backlight duration but didn't find it (using it in the night and want them to light up as short as possible).
Wifi connection there as soon as it wakes up.
So I gave BitGapps a go and flashed ARM64 which worked (isn't specified in "Q12" and as far as I remember only ARM worked on ripees build).
Fiddling around a bit installing paid apps and others.
Everything seems to be fine especially for a beta version.
For others who want to change from ripees version to this one:
On mine it worked to restore "Data" via TWRP (partition got wiped again before) what makes it much easier to switch.
Each app I use seems to be working under the new ROM without problems.
Fun fact: button backlight after restoring is as short as it was set in the prior ROM.

bmwdroid said:
Clean installation went well although I didn't follow "Q5" and used latest TWRP which is 3.6.1_9-0.
Click to expand...
Click to collapse
The reason I write MUST is that not all TWRP from the official TWRP site work properly. For example, when I was initially building the 18.1 tree back in July/Aug 2021, I needed mtp and adbd to work in TWRP T710 for debugging purposes.
Despite the change log claiming both were fixed, not a single version worked wrt mtp and adbd. I knew this way back in Dec 2020 and you may have even seen my post #124 since you were post #122 and #126 in the same thread.
So in order to get 18.1 up and running, I fixed TWRP T710 myself as I explain at
https://forum.xda-developers.com/t/recovery-unofficial-twrp-3-5-2_9-for-samsung-sm-t710.4430335/
So for T710 users, I know my TWRP build is rock solid as I have easily used it more than 150 times when making the 18.1 rom.
Another example. During the summer of 2020, I upgraded the OS on a Samsung S4 phone for my friend. I went to official TWRP website, downloaded the latest and much to my surprise, the touchscreen didn't work at all. I used an older TWRP version and it worked fine.
Bottom line: even though it's on the official TWRP website does not mean it's tested or working properly. In the case of the S4 TWRP with the non working touchscreen, it's obvious there was zero testing done.
That's why we will test ALL our 18.1 builds for the "what works" functionality in post #1 before uploading to the general public.
bmwdroid said:
Looking in settings for button backlight duration but didn't find it (using it in the night and want them to light up as short as possible).
Click to expand...
Click to collapse
By sheer coincidence, I already had the above in my private build on March 27 as I wanted to test it to make sure it works before adding it into github. Yes, I test even 1 line of code change myself no matter how trivial.
The 1 line of code needed is documented at
https://review.lineageos.org/c/LineageOS/android_device_samsung_s3ve3g-common/+/292889
I will put this change into my github so that it gets built with the May 5 security patches.
bmwdroid said:
Wifi connection there as soon as it wakes up.
Click to expand...
Click to collapse
My github repo has always had the S2 wifi blobs after @lpedia and I fixed it on Aug 7, 2021 as per
https://github.com/retiredtab/propr...mmit/3984c2ef6852794a939b8eda689fc477705d5c86
As you can see in my github history, that reversion back to S2 wifi has never changed since Aug 7, 2021.
bmwdroid said:
Fun fact: button backlight after restoring is as short as it was set in the prior ROM.
Click to expand...
Click to collapse
Without looking through the 1000's lines of code or more, the above functionality exists probably in the hardware/samsung repo
https://github.com/LineageOS/android_hardware_samsung/tree/lineage-18.1/hidl/light
and the settings are probably saved in some directory, but the display menu for the button backlights isn't shown until I put in that one commit above. That is, the OS knows to use the saved settings, but without the menu overlay, it doesn't show the menu itself.

retiredtab said:
The reason I write MUST is that not all TWRP from the official TWRP site work properly. For example, when I was initially building the 18.1 tree back in July/Aug 2021, I needed mtp and adbd to work in TWRP T710 for debugging purposes...
Despite the change log claiming both were fixed, not a single version worked wrt mtp and adbd. I knew this way back in Dec 2020 and you may have even seen my post #124 since you were post #122 and #126 in the same thread....
Click to expand...
Click to collapse
Well I gotta admit I didn't check adb and mtp in that TWRP.
I probably saw your post but might not have paid attention as they referred to T710 and as I own T810 I judged them as not relevant for me.
retiredtab said:
...
Bottom line: even though it's on the official TWRP website does not mean it's tested or working properly. ...
Click to expand...
Click to collapse
That's what I've noticed as well for T325.
retiredtab said:
..My github repo has always had the S2 wifi blobs after @lpedia and I fixed it on Aug 7, 2021 as per
https://github.com/retiredtab/propr...mmit/3984c2ef6852794a939b8eda689fc477705d5c86
As you can see in my github history, that reversion back to S2 wifi has never changed since Aug 7, 2021....
Click to expand...
Click to collapse
I just mentioned wifi functionallty for those users of T810 having problems with ripees ROM after version 20211103 and looking for a stable version regarding that feature.

retiredtab said:
......Without looking through the 1000's lines of code or more, the above functionality exists probably in the hardware/samsung repo
https://github.com/LineageOS/android_hardware_samsung/tree/lineage-18.1/hidl/light
and the settings are probably saved in some directory, but the display menu for the button backlights isn't shown until I put in that one commit above. That is, the OS knows to use the saved settings, but without the menu overlay, it doesn't show the menu itself.
Click to expand...
Click to collapse
The settings seem to be in the file /data_mirror/data_de/null/0/org.lineageos.lineagesettings/databases/lineagesettings.db
When opening in DB Browser I found:
In table "secure" the lines
46 "button_backlight_timeout" (value 1000 [probaly for milliseconds as I set it to 1s in ripees ROM]) and
47 "button_brightness" (value 1.0).
In table "system" the line
47 "button_backlight_only_when_pressed" (value 1).
Never worked with .db files myself before but for the knowing it might be interesting if they want to fiddle around a bit.

New build called lineage-18.1-20220510-UNOFFICIAL-gts210wifi.zip
Yogi555 has tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
May 10, 2022 release notes
1. YOU MUST read posts 1-4 if you haven't already
2. Added overlay for led capacitive led buttons as per https://github.com/retiredtab/andro...mmit/83551570e4627a0e353e358787f83aa65484b528
3. Incorporates May 5th security patches as per https://review.lineageos.org/q/topic:R_asb_2022-05
4. If you are upgrading from the April 10 build, you may dirty flash the May 10 build. If you are NOT coming from the April 10th, 2022 build, you MUST BACKUP your data because YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA. You cannot dirty flash at all. See FAQ Q11.

@retiredtab just flashed it onto 20220410.
1st try very dirty (not wiping anything) resulting in bootloop.
2nd flash (after wiping system+caches) of ROM, Bitgapps28-arm, Magisk23 made it start.
Magisk had of course to patch boot.img again.
Thx very much.

Due to a post in the T710 regarding gapps, I will be removing opengapps from the FAQ because for several months now (starting around Oct 2021), the opengapps project has been releasing UNTESTED builds that results in bootloops or non working gapps services. Despite numerous requests/posts from the community to slow down the releases and actually TEST THEM BEFORE release, the latest May 3, 2022 shows there is still room for improvement.
This thread in the opengapps forum is just the latest example. Details of UNTESTED builds are also in the same megathread below.
https://forum.xda-developers.com/t/...rsions-devices.3098071/page-367#post-86885091
It's also shown up in other roms like
https://forum.xda-developers.com/t/...7-1-04-30-2022.3937956/page-100#post-86885353
This would be a good time for user to do their own research on which gapps is best for them or use NONE at all. I use Aurora Store myself.
Just a reminder that the builds we release are TESTED and verified to have all the functionality as listed in post #1.
T710 thread post #8, #9 and #10.
https://forum.xda-developers.com/t/...neageos-18-1-for-sm-t710-may-12-2022.4430339/

I wanted to express my sincere thanks to @retiredtab and @Ipedia for your work on the ROMs for the T710 and T810. I have both devices and had previously used the @ripee versions in thread (2) [ROM][UNOFFICIAL][11] LineageOS 18.1 [T710][T715][T715Y][T810][T815][T815Y] | XDA Forums (xda-developers.com). But that 18.1 version had some noticeable bugs and wasn’t being maintained.
Thanks to @bmwdroid ’s April 15 post directing us to this forum, I have been experimenting with this ROM since then on both the T710 and the T810. Based on my pretty heavy usage, I can declare both to be excellent. Most notably, the WiFi is rock solid. The T810 and the T710 (especially) are outstanding hardware, and being able to run Android 11 is a huge boost in the device’s intrinsic value.
I have experienced a couple of random BSOD-equivalent crashes over the past month, but the tablet always immediately restarted. I am going to try and learn how to provide the necessary to the developers so, if it happens again, they can have the necessary evidence. Since I am a decent techie, but not a developer, I decided to write up the complete upgrade procedure I followed so others who come to this forum may benefit. See my next post.
PS: I put this post on both the T710 and the T810 threads since I have both devices.

Tab S2 T710 and T810 Upgrade Procedure Using LineageOS 18.1 ROM by retiredtab
These installation instructions work for both Tab S2 T710 and T810. I have both devices and have tested on both. I am a Windows guy, so these instructions assume a Windows PC. I am a lifelong techie guy and an Android enthusiast. But I am not developer, so these instructions should work for any competent newbie who is a decent techie, but I realize there may be alternative approaches for those who have deeper tech knowledge than me.
Step 1 – Preparation
Update your Tab S2 to the latest stock software.
Install a micro-SD card into your Tab S2.
Enable Developer Options – tap Build Number seven times.
In Developer Options, turn on USB debugging.
Connect your TGab S2 to your PC via USB and download onto the micro-SD card three files:
Retiredtab’s latest Lineage 18.1 ROM from lpedia-sf - Browse /gts28wifi at SourceForge.net (T710) or retiredtab - Browse /SM-T810/18.1 at SourceForge.net (T810)
open_gapps-arm-11.0-pico-20220215.zip from The Open GApps Project
Magisk-v24.3.apk from Release Magisk v24.3 · topjohnwu/Magisk · GitHub
Download to your PC TWRP_3.5.2_9_SM-T710_20210719_Unofficial.tar from retiredtab - Browse /SM-T710/TWRP at SourceForge.net (T710) or twrp-3.5.2_9-0-gts210wifi.img.tar from Download TWRP for gts210wifi (T810)
Download to your PC Odin, from https://technastic.com/wp-content/uploads/2020/02/Odin3_v3.14.4.zip, and extract the zip.
Comments:
I saw retiredtab’s comments about OpenGApps quality. However, this version works well for me. I had previously tried the latest MindTheGapps (which hung) and BiTGapps (which doesn’t include the Google restore functionality that I use.)
Magisk is optional if you want/like root. I do!
Step 2 – Install TWRP Recovery
Power off your Tab S2.
Launch Odin on your PC and press OK.
Power up your Tab S2 into Download mode by holding down Home+VolDown+Power.
Then at the Warning screen hit VolUp.
Connect your Tab S2 via USB to your PC, and you should see Added!! in Odin.
Click AP in Odin and select the downloaded TWRP.
In Odin Options, uncheck Auto Reboot.
Click Log tab again.
Click Start in Odin.
Installed TWRP only takes a couple of seconds.
You will see progress in the Log, and Pass at the top of Odin when done.
Step 3 – First boot into TWRP.
This part is tricky!
Power down your Tab S2 by holding down VolDown+VolUp+Power.
IMMEDIATELY the screen goes blank, hold down Home+VolUp+Power.
Keep holding down until you see the TWRP home page.
If you end up booting into Android rather than TWRP then you will have to repeat steps 2 and 3 again.
Step 4 – Backup your stock ROM
In TWRP, select Backup, Select Storage to choose your micro-SD card, check all the boxes, and then swipe Backup.
Step 5 – Install ROM and GApps.
In TWRP, select Wipe, then Advanced Wipe.
Select all partitions except Micro SD Card.
Swipe to Wipe.
Back, Back again, then Format Data
Type yes, and hit check.
Back, Back, Back, and select Install.
Select your micro-SD storage.
Select the Lineage-18.1 ROM.
Add more Zips, and select open_gapps.
Swipe to confirm Flash.
Installation took about 3 minutes.
Wipe Cache/Dalvik, and Swipe to Wipe
Reboot System
Step 6 – Build your Android 11 Tab S2
First boot into Lineage was less than a minute, and then the Lineage boot animation took less than 2 minutes before “Hello” appeared.
On each build I’ve done I see “Speech services by Google keeps stopping” error once Hello appeared.
I assume this is one of the known OpenGApps bugs.
Clicking Close App makes it go away, and later Google replaces the module anyway.
Set up your Android device per your preference. I have loads of Apps so it takes me a long time. If you are less of a pack-rat, it shouldn’t take long!
At the end of the initialization process, be sure not to choose the Replace Lineage recovery option, otherwise TWRP goes away.
I have found that, by not installing Magisk initially, Google restores all my Apps, including the sensitive ones such as Peacock, Netflix, Disney+, etc. And when I check Google Play/Settings and scroll to the bottom, I see “Device is certified”.
I recommend leaving tablet completely alone until Google has finished its “Copy Apps and Data” from my other tablet. When I get impatient and fiddle around as it’s copying I’ve seen crashes.
Once all copying is done, do your unique Android setup. My go-to Android settings are:
Nova Prime Launcher (actually, gets selected during the copy process, but I load my layout from backup at this time)
Microsoft Swiftkey
Default USB = File Transfer
Window/Transition/Animator Scale all set to Animation Off
Screen timeout 30 minutes, and screen saver Clock
Battery %age next to icon
FX File Explorer
Microsoft Edge as default browser (with AdBlock enabled and Google as search and sync to my PC)
Raindrop, for all my bookmarks
Advanced restart menu (to allow reboot into TWRP).
Step 7 – Make Root
Restart Tab S2 into TWRP.
In TWRP, Install Magisk-v24.3.apk.
Reboot System
In Android install Magisk-v24.3.apk.
Open Magisk and select zygisk in settings.
Restart again.
You now have root. I test by enabling root in FX File Explorer and granting root.
Step 8 – All done!
I do a final and full TWRP backup once the device is solid.
Note:
I found the fingerprint reader sometimes works to unlock the Tab S2. Per other discussions on this thread, looks like I got lucky!

pflyaz said:
Tab S2 T710 and T810 Upgrade Procedure Using LineageOS 18.1 ROM by retiredtab
Click to expand...
Click to collapse
Thanks. I updated FAQ to point to post #16 for newbies.

Hi just a question regarding Q5
A5. You MUST use TWRP 3.5.2_9.
Is there a reason for this! I'm only asking because I have 3.6.0.9-0 installed so just wondered why its a must.
Edit - ignore the message above I didn't see post 9 when reading this on my tablet but do now I am on PC.

Had this running now for the last 5 hours, everything seems to be fine but I'm seeing very slow WiFi speeds. Coming straight from (lineage-18.1-20211103-UNOFFICIAL-gts210wifi) where I was getting a constant speed over 330mb I'm now only getting 110 dropping down to 70 at best.

lojelo said:
Had this running now for the last 5 hours, everything seems to be fine but I'm seeing very slow WiFi speeds. Coming straight from (lineage-18.1-20211103-UNOFFICIAL-gts210wifi) where I was getting a constant speed over 330mb I'm now only getting 110 dropping down to 70 at best.
Click to expand...
Click to collapse
@retiredtab Maybe just a wild guess, but might this commit be related? In my understanding argosd is a daemon that controls the CPU governor so that CPU performance can be adopted to network bandwith requirements. Shouldn't that be activated for Wifi models as well?

Android 12 GSI Post Install Fixes

I have been messing around with GSI roms on this device for a little over a month, and I've created some Magisk modules and an Xposed module to begin to fix the issues with the Cli display.
Disclaimers (READ THESE!!):
There are still a number of other issues with GSIs on this device, so I wouldn't recommend doing this if you use your razr as your main phone.
If you brick your device, it is your own responsibility. I am not responsible for any damage that my modules or advice might cause to your device. Do not blame me for bricking your device.
This is not written to be easy for beginners. If this is your first time modifying a device's firmware, I would advise against starting with this phone. But I would highly recommend you to start on a different device that has less restrictions and is much cheaper.
If I do not mention how to do something, you should look up a guide first before asking me. The guides that other people write are likely going to be much better and easier to understand than one I can write.
Please note that these modifications may not work on your device if the hardware is slightly different, even if it has the same model number as mine. These modifications are mainly a proof of concept, but I am open to modifying them to work on more devices.
If you are curious about how any of these modifications work, see the readme on the modules' github repositories.
By following the steps in this post, you accept that you may end up with either an expensive paperweight, or a mostly functional device with a GSI rom.
These modifications have been tested on my XT2071-3
First thing to do is to make sure you have a way of recovering your phone if it soft bricks. I downloaded the stock rom from lolinet. Make sure you have a rom that is the same version as your current rom. Motorola leaves anti-rollback enabled even if you have an unlocked bootloader.
If mess up, you can just restore it using fastboot (look up a guide)
If you really messed up, you can always try to use the "Rescue and Smart Assistant Tool", but that may be a last resort due to privacy concerns.
If you really really messed up, you may have to use a blank flash. I haven't ever had to use a blank flash, so I can't vouch for whether or not it will work. (don't do it if you don't have to)
The build number of the OS I used when installing the GSI is: RPSS31.Q1-40-34-15-10-15
Spoiler: Installing
It may also be worthwhile to flash copy-partitions-20210323_1922.zip from a custom recovery to prevent accidentally hard bricking your device. (this is recommended by the Lineage OS wiki for most devices with an a/b partition layout, so I figured I should probably use it just to be safe).
You can use thenameisnigel's unofficial TWRP image, or the unofficial lineage recovery that I attached to this post (I would not recommend flashing either one. Use "fastboot boot recovery.img" instead.) I attached the lineage recovery because it's easier to use without touch support, but either should work just fine.
You may also choose to root your phone with magisk before installing the GSI. It will be necessary for the post-install fixes, and may be harder to install after the fact.
I will not go into too much detail of how to install GSI roms, but here is a rough recreation of the fastboot commands I used:
Code:
fastboot reboot fastboot
fastboot --disable-verification flash vbmeta vbmeta.img
fastboot erase system
fastboot delete-logical-partition product_a
fastboot flash system gsi.img
fastboot -w
fastboot reboot
You should look up a tutorial if you need help. I'm not an expert on any of this.
I've tested:
This release of Phh Treble (the one with gapps doesn't work)
This release of Andy Yan's Lineage OS 19
This release of ponces' Pixel Experience GSI
All of them using the vndklite version, and I have not been able to get Android 11 to work.
Spoiler: Fixing the cli display
Once you boot into the GSI, you will notice that the Cli display will show a keyguard presentation that will freeze and stay on the screen after you unlock the device. You may also notice that touching the Cli display will interact with the main display, and not the Cli display like it should.
To fix this, you can install this magisk module: Razr5G Synaptics Touchscreen Device Associations
Before installing, you may want to mute your ringer, since it will break audio (more on that later)
This magisk module adds a configuration file that will map the touch screens to their respective displays.
Now the touch screen maps correctly, but there's still nothing to interact with.
To fix this, you can install another magisk module: Razr5G Foldable Device Fixes
These are two separate magisk modules because I will be releasing more modules that will utilize the cli display in different ways.
This magisk module will configure Android to treat the phone like a foldable device similar to the Samsung Z Fold. This is not the stock behavior of the device, which is why I will be making different modules that activate the display in a way closer to stock.
Now the cli display will actually show the UI if you turn off the display, close the device, and then wake the device. The UI will even transition from the cli display to the main display when you open the device. But if you close the device while the screen is on, the system will freeze. This has to do with Android's display manager referencing a display that the lid sensor just requested to turn off.
To avoid this conflict, I have an Xposed module this time: Cli Lid Functions
I recommend using LSPosed. You will need to enable this module for "System Framework"
This Xposed module will disable the lid sensor's ability to turn off the display. This is not ideal, but it's better than having to reboot your phone.
Spoiler: Fixing audio
For whatever reason, installing magisk modules that modify /vendor/etc on a GSI on phone will replace the audio policies with empty ones. This is not ideal, as it forces audio out of the speakers at full volume. The original audio policies still exist in the magisk mirror under vendor/etc (but not system/vendor/etc). You can overwrite the blank ones and change a setting to restore functioning audio.
1. Overwrite the blank audio policy:
You can do this with a root file explorer, or through the shell
Method A - Root File Explorer:
go to the magisk tmpfs (type "magisk --path" in a shell running as superuser. Example: `/dev/ABcD12`)
then go to .magisk/mirror/vendor/etc (you may need to show hidden files)
copy a2dp_audio_policy_configuration.xml and audio_policy_configuration.xml
paste them in /vendor/etc on the system root (make sure to overwrite the empty files)
Method B - Shell:
Run these commands in `adb shell` or your favorite terminal emulator
Code:
su
cp $(magisk --path)/.magisk/mirror/vendor/etc/a2dp_audio_policy_configuration.xml /vendor/etc
cp $(magisk --path)/.magisk/mirror/vendor/etc/audio_policy_configuration.xml /vendor/etc
After overwriting the files, do not reboot (otherwise they will get overwitten again).
2. Enable "Use alternative audio policy"
Go to `Settings > Phh Treble Settings > Qualcomm features` and enable "Use alternative audio policy"
3. Reboot
Now you can reboot, and you should have working audio again.
Spoiler: Working/Broken
What's working:
UI on the second display (opening apps, checking notifications, etc.)
Only one display on at a time
Display cutout
Camera (plus, only the outer camera works when the display is folded)
Volume buttons flipping when the lid is closed
Fingerprint
Wifi, Bluetooth, and Bluetooth audio (after disabling the hardware offload)
SMS (kind of... and only with an ims.apk)
Data
Battery life is better than stock
A lot more that I'm missing...
What's broken:
System UI is not optimized for the second display
Brightness on the secondary display
More that I'm missing...
I am still new to GSIs, so I haven't tested a whole lot, or attempted to fix much other than this.
Downloads:
Razr5G Synaptics Touchscreen Device Associations
Razr5G Foldable Device Fixes
Cli Lid Functions
Unofficial Lineage Recovery
While I could build my own GSI rom to deal with all of these issues, I chose not to since it would take more time. There is also another advantage of these modifications, which is that they can be applied to a wide variety of GSIs without having to modify each one manually.
Also, Motorola won't let a $1000+ phone boot with a modified vendor partition, for whatever reason.
This was my first time ever making a magisk module, my first time ever making an Xposed module, my first time ever working with the Android system on this low of a level, and my first time installing a GSI rom.
I may update this post with more progress in the future.

reserved

[UNOFFICIAL][ROM]ALPHA LineageOS 19.1 for SM-T710 - June 12, 2023

LineageOS 19.1 UNOFFICIAL for 2015 Samsung Galaxy Tab S2 SM-T710 ONLY​Model: SM-T710 (wifi) - gts28wifi - 8" screen, Exynos 5433 SoC, no LTE
This is the ONLY model that the ROM will work on.​
There is NO ROM for the T715 or T815 in this thread. Questions about T715 or T815 will be completely IGNORED.
You MUST READ posts 1-4 (about 10 minute read) before deciding to install this rom. If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
DISCLAIMER
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
All involved in bringing this build to you are working voluntarily on it in very limited spare time, and their other life commitments have much higher priority. Don't expect a prompt, or even any, response to questions and bug reports.
Before attempting to install this ROM
1. Ask yourself: would bricking your device be a disaster for you? If yes, don't try this ROM! It can't be guaranteed stable and reliable enough to depend on for daily use.
2. BACKUP YOUR DATA AND EXISTING ROM. Be prepared for a complete restore if anything goes wrong.
3. RESEARCH adb, fastboot, Odin/heimdall, and TWRP and how to use them, if not already familiar with these.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. DRM level 3 (SD definition)
10. deep sleep
11. camera
1. fingerprint is completely removed in 19.1. When I tested it in March 2022, it wasn't compatible with keystore2 and as I wrote in post 1891 at
https://forum.xda-developers.com/t/...t810-t815-t815y.3879302/page-95#post-85533725
it never worked properly after deep sleep. If you need fingerpint to work, stay with stock Samsung rom.
2. DRM level 1 (no HD definition). There's more detail in post 1891 above. I will not be trying to achieve level 1 for HD definition. If you need HD definition for your $treaming media, stay with stock Samsung rom.
3. workaround to disable scoped storage. In 18.1 there was a workaround to disable scoped storage, but that no longer works in 19.1. So if you have a lot of apps or data on an external microsd, the performance may be severely degraded.
4. If you charge the device while it's powered off and then want to power it on, you MUST wait at least 30 seconds AFTER disconnecting the charger cable before pressing the power button otherwise you might run into strange boot problems.
5. keyboard bug workaround. When prompted to enter something like a Bluetooth pin or text based password, sometimes the keyboard is not shown on the screen or off screen. The workaround is to goto settings, system, languages & input, on-screen keyboard, Android Keyboard (AOSP), appearance & layout, theme and choose "Material - follow system settings".
This keyboard bug is a LineageOS bug as per
https://review.lineageos.org/c/LineageOS/android_packages_inputmethods_LatinIME/+/325438
6. Possibly other features that I haven't tested or do not use.
Source Code
See FAQ 1 for links in post #2.
Thanks
1. LineageOS team for source code.
2. In alphabetical order.
@ananjaser1211
- helping out with libGLES_mali problem when I couldn't figure out why T810, for 3 months, wasn't booting with graphics
- answering more 5433 related questions wrt to certain features.
@bluess57
- joining the team and helping fix some of the legacy code problems
- pending code commits to come in the future
@bmwdroid
- testing many pre ALPHA builds and reporting the results
@CuckooPenguin
- testing many pre ALPHA builds and reporting the results, but sadly his T810 was killed by a cat (true story)
exynos5420 team
- making suggestions regarding radare2 debugger/code analyzer when I couldn't figure out why T810, for 3 months, wasn't booting with graphics
Kyle Harrison
- giving me a clue on how to fix the binder/keystore2 problem with msm8916 which ultimately led me to fix the same problem on the exynos5433 devices
- sharing his code on his github repos where I could study his commits to help bring up 19.1
- making code commits on LineageOS wrt to legacy devices like ours
- sharing the repopicks necessary to bringup 19.1
@lpedia
- testing many pre ALPHA T710 builds starting in April 2022 and reporting the results
- verifying my build instructions work so that the technically inclined can build this from source
- building, maintaining and most importantly, testing the T710 18.1 builds before monthly security patches release
- volunteering to build, maintain and test T710 19.1 builds
@metterschling
- reaching out and joining our group to help with code and fix problems
- testing many pre ALPHA builds and reporting the results
- pending code commits to come in the future
@pflyaz
- testing many pre ALPHA builds and reporting the results
- writing install instructions for the newbies
@simon-edwards
- reaching out and joining our group to help with code and fix problems
- testing many pre ALPHA builds and reporting the results
@tarkzim
- helping me fix the gpsd crash problem because I was missing the libutils library in my Android.bp file
- sharing his code on his github repos where I could study his commits to help bring up 19.1 especially wrt to hal audio 2.0 and camera 1.0
@Yogi555
- testing many pre ALPHA builds and reporting the results
- building, maintaining and most importantly, testing the T810 18.1 builds before monthly security patches release
As you can see, it's truly a team worldwide effort in getting this ALPHA 19.1 build out.

Frequently Asked Questions. You MUST READ this before posting any questions. Thank you.
QuestionAnswerQ1. Can I build this ROM for myself? Where are the source and kernel source files?A1. Yes, you can. The source files are listed below.
Kernel
https://github.com/retiredtab/android_kernel_samsung_universal5433-selinux
Device Tree
https://github.com/retiredtab/android_device_samsung_gts2-common-selinux
https://github.com/retiredtab/android_device_samsung_gts28wifi
Vendor
https://github.com/retiredtab/proprietary_vendor_samsung-selinux
The build manifest and instructions on how to compile from source are at
https://github.com/retiredtab/LineageOS-build-manifests
The other patch required for tcp/ip is at https://github.com/DerpFest-11/pack...mmit/22fd53a977eeaf4e36be7bf6358ecf2c2737fa5eQ2. Is this ROM suitable as a daily driver?A2. It might be, depending on your requirements. You would need to try it yourself, with your preferred apps, to see if suits your purposes. I've been using it myself since mid April, 2022 with no major issues.Q3. What do I do if my app xyz doesn't work?A3. I can't help diagnose problems with random apps I know nothing about. If the app is critically important to you and it doesn't work on this ROM, go back to a ROM where it did work.Q4. Why is this ROM laggy and/or buggy?A4. The device will be noticeably slower if you're using any Gapps package. Consider going gapps-free. A lot of apps will work without Google's services, or there exist alternatives that will. Check out F-Droid, Aurora Store, NewPipe, etc.Q5. What TWRP should I use?A5. You MUST use TWRP 3.5.2_9. Get it from https://github.com/retiredtab/android_device_samsung_gts28wifiQ6. Why should I use this ROM?A6. You don't have to! If you don't like it, go back to your old ROM.Q7. Will you offer monthly updates with security patches?A7. We plan to do so. We will try to update the ROM with the monthly security patches after LineageOS has released them, free time permitting. Each monthly build will be tested to make sure all the "What works" functionality listed in post #1 still works, before it's made available (which might in some cases delay the release).Q8. I'm a newbie. Can you provide step by step instructions?A8. We simply don't have the time to do this, but there are lots of tutorials, videos, etc online showing how to flash custom ROMs and how to deal with common problems. Newbie questions are also accepted in the XDA General Questions and Answers forum.
Having said that pflyaz has kindly provided instructions in post #5.Q9. Can I report a bug with respect to the ROM?A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
Provide an adb logcat of the problem, and if possible describe how to reproduce it. Note that I can't help if it involves downloading any app I don't already use that requires payment or creating a userid/password.
To get a logcat, open a terminal window on your PC, connect your device to it via USB, and do this:
Bash:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occurred,
# then stop trace by hitting ctrl-c then zip the problem.txt file
# before uploading it.
Q10. How long will you build 19.1 for this device?A10. For now, 19.1 will be built for all of 2022. After that, we will make a decision depending on a number of factors.Q11. Do I need to erase everything and format my data before installing this ROM for the first time?A11. If you're coming from stock Samsung Android, or an earlier version of LineageOS, or a different custom ROM, you MUST 'clean flash': boot to TWRP recovery, wipe system, data, dalvik/art cache, and cache partitions, then Format Data, then install this ROM.
If you don't do this you're likely to run into problems, such as getting stuck at the boot animation for more than 5 minutes.Q12. What Gapps should I use?A12. Your choice! There are several well-known Gapps packages, such as NikGapps, BiTGapps, OpenGapps, and MindTheGapps. Do your own research as to what is the most reliable gapps option for you. As a courtesy to gapps users, I opened a thread at
https://forum.xda-developers.com/t/...on-for-19-1-roms-sm-t710-and-sm-t810.4480041/
for you to discuss gapps. Do not discuss gapps in this thread. Thank you.
You could also consider Google alternatives, such as Aurora Store, which mirrors the Google Play Store apps but doesn't need any Google services itself. Many Play Store apps do not actually depend on Google services.
If you are going to install any Gapps package, follow the installation instructions given for that particular package.Q13. I'm having problems with Gapps. Can you tell me why it's not working?A13. I can't answer any questions about Gapps, because I don't use them. Ask your questions on the XDA thread for the Gapps package you're using.Q14. Why isn't my post answered?A14. There are several possible reasons: the question is answered in the FAQ (in which case it will be ignored completely); or it involves apps or operating systems that I don't use; or it's about Gapps, which I don't use; or I simply have not had time to answer any questions.Q15. What speed up/optimization tips do you suggest?A15. These steps can make a big difference to performance:
Turn off animations. Go to Settings > System > Developer options, scroll down to the Drawing section, and set Window, Transition and Animator scale all to "Animation off".
Don't install Gapps unless you depend on something that only Google is providing. Use Aurora Store to get your preferred Play Store apps - they will all be available on Aurora Store. You can choose to access this anonymously or use a Google account.
Don't run more than two apps at the same time. You can probably listen to music in the background and use a web browser at the same time.
Use a web browser with built-in adblock and privacy features, such as Brave.
Use NewPipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
Look for apps that are open source, ad-free and lightweight.
Q16. Does this ROM support Magisk so I can root my device?A16. Magisk works with this ROM as reported by beta testsers, but that could change with any revision and changes by Google. However I don't use it myself and can't help with any related issues. Direct any questions about Magisk to the XDA Magisk forum.Q17. Will this ROM ever become official?A17. With 19.1, legacy devices like ours will NEVER be official due to lack of ebpf support. See https://lineageos.org/Changelog-26/Q18. What is the difference between this ROM and others?A18. This ROM tries to be pure LineageOS with little or no modification. Other ROMs may come with a different UI, different bundled apps, etc.Q19. Will there be any major 19.1 code modifications in the future?A19. There may be some major modifications along with some slight tweaking to the SEpolicy, small bug fixes and minor code cleanup, but all the hard work - getting the rom up and running, and fixing all the major bugs - has been done.Q20. Why did you fork the trees?A20. I wanted my own private branch where I could make changes that would only affect my own personal builds.Q21. Can you build a variant of this device? For example, a LTE or S-pen version?A21. I cannot and will not try to build for a variant device if I don't physically have that device. I have to be able to boot and test it myself, and there's no guarantee that I can get those variant features working.Q22. Can I load this ROM on a variant device like LTE or S-pen version?A22. This ROM is for the device explicitly listed and will only work on that device. Do not try to install it on any other device.
ONLY if you are an advanced user and understand TWRP, adb, odin, heimdall, etc, you could try loading it on a LTE or S-pen variant by modifying the updater-script, but be warned: there are likely to be problems, including a bricked device, bootloops, or the ROM not being able to support the functionality of LTE/S-pen.Q23. Does this ROM have any wifi connection issues?A23. This ROM's wifi has been stable on the specified device ever since lpedia and I determined the root cause of the wifi problems back in July 2021 and re-installed the original S2 network 'blobs' with LOS 17.1.Q24. Is this ROM secure so I can do financial transactions?A24. Although Android monthly security patches do improve general security, this ROM's outdated kernel and old proprietary vendor blobs/drivers will NEVER get updates of any kind, and could have significant security holes.
In addition, although the ROM is SElinux enforcing, there's a good chance that the rules written (about 800+ lines of code) have some errors.
If the device is rooted, this would further weaken the security.
With this information, it's up to you to make an informed decision about whether you trust this ROM to be secure enough for your financial transactions.Q25. How do I turn off the taskbar at the bottom of the screen?A25. Goto settings, system, buttons and disable taskbar.Q26. Okay, I understand the consequences and willing to take the risks outlined, now where can I find the ALPHA rom?A26. Downloads are at https://sourceforge.net/projects/lpedia-sf/files/gts28wifi-19.1/

NOTE: lpedia has personally tested each build on his device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
June 12 , 2023 release notes
1. June 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2023-06
May 7 , 2023 release notes
1. May 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2023-05
Apr 18 , 2023 release notes
1. Apr 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2023-04
March 20 , 2023 release notes
1. Mar 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2023-03
Feb 12 , 2023 release notes
1. Feb 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2023-02
2. Use stock android.hardware.power for CPU/SoC management so little cores can go as low as 400Mhz. Previously, the minimum clock speed was 1200Mhz and this may have caused some overheating. See
https://github.com/retiredtab/andro...mmit/8480e024cb15d82b9d418c44efd9257db173b49e
Jan 8, 2023 release notes
1. Jan 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2023-01
Dec 12, 2022 release notes
1. Dec 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-12
Nov 11, 2022 release notes
1. Nov 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-11
Oct 10, 2022 release notes
1. Oct 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-10
Sept 11, 2022 release notes
1. Sept 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-09
2. Removed settings menu option for fast charging. S2 tablet devices do not support this.
https://github.com/retiredtab/andro...mmit/8068a4a66ae7c576973807b392e686110126150c
Aug 11, 2022 release notes
1. Aug 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-08
2. Initial ALPHA release to public.

Reserved.

Tab S2 T710 Upgrade Procedure for the LineageOS 19.1 ROM by retiredtab
These installation instructions work for both Tab S2 T710 and T810, starting from a device running stock Android 7.0. I have both devices and have tested the procedure on both. I am a Windows guy, so these instructions assume a Windows PC. I am a lifelong techie guy and an Android enthusiast. My current “production” devices are Samsung S22 Ultra and Samsung Tab S7, but I do love the size and performance of the Tab S2 T710 so am extremely happy that @retiredtab and @lpedia have been successful at making Lineage 19.1 run on the Tab S2. But I am not developer, so these instructions will work for any competent newbie who’s looking for LOS 19.1 on their Tab S2 tablet. I do realize there may be alternative approaches for those who have deeper Android tech knowledge than me, but this procedure does work every time.
Step 1 – Preparation
Update your Tab S2 to the latest stock software.
Install a micro-SD card into your Tab S2.
Enable Developer Options – tap Build Number seven times.
In Developer Options, turn on USB debugging.
Connect your Tab S2 to your PC via USB and download onto the micro-SD card three files:
Retiredtab’s latest Lineage 19.1 ROM from lpedia-sf - Browse /gts28wifi-19.1 at SourceForge.net (T710) or retiredtab - Browse /SM-T810/19.1 at SourceForge.net (T810)
NikGapps-core-arm64-12.1-20220709-signed.zip from https://sourceforge.net/projects/nikgapps/files/Releases/NikGapps-SL/
Magisk-v25.2.apk from https://github.com/topjohnwu/Magisk/releases
Magisk is optional if you want/like root.
Download to your PC TWRP_3.5.2_9_SM-T710_20210719_Unofficial.tar from retiredtab - Browse /SM-T710/TWRP at SourceForge.net (T710) or twrp-3.5.2_9-0-gts210wifi.img.tar from Download TWRP for gts210wifi (T810)
Download to your PC Odin, from https://technastic.com/wp-content/uploads/2020/02/Odin3_v3.14.4.zip, and extract the zip.
Step 2 – Install TWRP Recovery
Power off your Tab S2.
Launch Odin on your PC and press OK.
Power up your Tab S2 into Download mode by holding down Home+VolDown+Power.
Then at the Warning screen hit VolUp.
Connect your Tab S2 via USB to your PC, and you should see Added!! in Odin.
Click AP in Odin and select the downloaded TWRP.
In Odin Options, uncheck Auto Reboot.
Click Log tab again.
Click Start in Odin.
Installing TWRP only takes a couple of seconds.
You will see progress in the Log, and Pass at the top of Odin when done.
Step 3 – First boot into TWRP
This part is tricky!
Power down your Tab S2 by holding down VolDown+VolUp+Power.
IMMEDIATELY the screen goes blank, hold down Home+VolUp+Power.
Keep holding down until you see the TWRP home page.
If you end up booting into Android rather than TWRP then you will have to repeat Step 2 and Step 3 again.
Step 4 – Backup your stock ROM
In TWRP, select Backup, Select Storage to choose your micro-SD card, check all the partition boxes, and then swipe Backup.
Confirm your backup is good
In TWRP, select Wipe, then Advanced Wipe.
Select all partitions except Micro SD Card (and USB OTG).
Swipe to Wipe.
Back, Back again, then Format Data
Type yes, and tap check.
Back, Back, Back, and select Restore.
Select Micro SD card and your backup.
Restore all partitions and allow restore to complete.
Reboot to System, and confirm you are back to stock.
Step 5 – Install ROM and NikGApps
In TWRP, select Wipe, then Advanced Wipe.
Select all partitions except Micro SD Card (and USB OTG).
Swipe to Wipe.
Back, Back again, then Format Data
Type yes, and tap check.
Back, Back, Back, and select Install.
Select your micro-SD storage.
Select the Lineage-19.1 ROM.
Add more Zips, and select nikgapps.
Swipe to confirm Flash.
Install takes about 3 minutes.
Wipe Cache/Dalvik, and Swipe to Wipe.
Reboot System.
Step 6 – Build your Android 12 Tab S2
First boot into Lineage is less than a minute, and then the Lineage boot animation takes less than 1 minute before “Welcome to LineageOS” appears.
At the end of the initialization process, be sure not to choose the Replace Lineage Recovery option, otherwise TWRP goes away.
Set up your Android device per your preference. I am a mainstream Google/Google Play Apps user, and I have loads of Apps, so it takes me a long time to install my Apps and set the tablet up for daily use. If you are less of a pack-rat, it shouldn’t take long!
I have found that, by not installing Magisk initially, I can restore all my Apps, including the sensitive ones such as Peacock, Netflix, Disney+, etc. All Apps run normally, and when I check Google Play/Settings and scroll to the bottom, I see “Device is certified”.
I recommend leaving tablet completely alone during the initial Apps and Data restore process. When I get impatient and fiddle around as it’s copying I’ve seen crashes.
Once all copying is done, do your unique Android setup. My go-to Android settings are:
Nova Prime Launcher (actually, gets selected during the initialization process, but I load my layout from backup at this time)
Microsoft Swiftkey
Screen timeout 30 minutes, and screen saver Clock
Dark theme off
Disable taskbar.
Plain dark blue wallpaper
Touch, screen locking, and charging sounds off
Battery %age next to icon
Default USB = File Transfer
Developer Options enabled, and USB and Rooted debugging selected
Window/Transition/Animator Scale all set to Animation Off
FX File Explorer
Microsoft Edge as default browser (with AdBlock enabled and Google as search and sync to my PC)
Raindrop, for all my cross-platform/device bookmarks
Advanced restart menu (to allow reboot into TWRP).
Step 7 – Make Root – Optional
Restart Tab S2 into TWRP.
In TWRP, install Magisk-v25.2.apk.
Reboot System
In Android install Magisk-v25.2.apk.
Open Magisk and select zygisk in settings.
Restart again.
You now have root. I test by enabling root in FX File Explorer and granting root.
Step 8 – All done! Enjoy!
I do a final and full TWRP backup once the device is solid on Lineage 19.1.

On lineage-19.1-20220811-UNOFFICIAL-gts28wifi.zip I don't have an onscreen keyboard. I rebooted into TWRP and tried the GBoard Add On, but after that stil no onscreen keyboard. Installed it with NikGapps core and retried with full. If you use full, something from Google keeps crashing.
In system settings with full NikGapps, only keyboard available is Google speak option.
Both were Clean Installs.

djcasl said:
I don't have an onscreen keyboard.
Click to expand...
Click to collapse
We found another way to workaround the missing on screen keyboard. @lpedia tested with the Google login accounts and I tested it with Bluetooth numeric PIN. It's documented back in post 1 to say
=== begin ===
keyboard bug workaround. When prompted to enter something like a Bluetooth pin or text based password, sometimes the keyboard is not shown on the screen or off screen. The workaround is to goto settings, system, languages & input, on-screen keyboard, Android Keyboard (AOSP), appearance & layout, theme and choose "Material - follow system settings".
=== end ===

retiredtab said:
We found another way to workaround the missing on screen keyboard. @lpedia tested with the Google login accounts and I tested it with Bluetooth numeric PIN. It's documented back in post 1 to say
=== begin ===
keyboard bug workaround. When prompted to enter something like a Bluetooth pin or text based password, sometimes the keyboard is not shown on the screen or off screen. The workaround is to goto settings, system, languages & input, on-screen keyboard, Android Keyboard (AOSP), appearance & layout, theme and choose "Material - follow system settings".
=== end ===
Click to expand...
Click to collapse
I can try again. However, I went to languages and input and there was no keyboard option whatsoever. I tried manage keyboards, but could not activate one as well. To me it looked like there was no onscreen keyboard installed at all. So I couldn't use this workarround.
Update:
So I reinstalled, but one thing I didn't do is change initial language to Dutch. So now I am going see if I can restore my device, but so far it hasn't found my backup. Or asked to restore it. Don't know how I can reinitilaze that if not asked at setup.
Update 2: Reinstalled with NikGapps Omni this should have google setup and google restore. But didn't get question to add google account during setup. After adding account didn't get a question to restore data.

New build called lineage-19.1-20220911-UNOFFICIAL-gts28wifi.zip
NOTE: lpedia has personally tested each build on his device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
Sept 11, 2022 release notes
1. YOU MUST read posts 1-4 if you haven't already.
2. Sept 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-09
3. Removed settings menu option for fast charging. S2 tablet devices do not support this.
https://github.com/retiredtab/andro...mmit/8068a4a66ae7c576973807b392e686110126150c

Error!

retiredtab said:
New build called lineage-19.1-20220911-UNOFFICIAL-gts28wifi.zip
NOTE: lpedia has been personally tested each build on his device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
Sept 11, 2022 release notes
1. YOU MUST read posts 1-4 if you haven't already.
2. Sept 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-09
3. Removed settings menu option for fast charging. S2 tablet devices do not support this.
https://github.com/retiredtab/andro...mmit/8068a4a66ae7c576973807b392e686110126150c
Click to expand...
Click to collapse
Thanks for the charging fix. Now my tablet does not get hot while charging. That's great!
But the charge does not show more than 76%. I have left it for 2 days untouched but it does not go above 76%. It did this even before the 9/11/22 version. Unless I need to recalibrate battery??? Never had to do that before.

chappatti said:
But the charge does not show more than 76%. I have left it for 2 days untouched but it does not go above 76%. It did this even before the 9/11/22 version. Unless I need to recalibrate battery??? Never had to do that before.
Click to expand...
Click to collapse
I suggest the following:
1. boot into TWRP and see what the battery % is. If it's not 100%, let it charge to 100%.
2. After charged to 100%, boot into OS and see if it's at 100%.
3. If OS shows 100%, it's fixed. If not, repeat steps 1 and 2 at least 3 more times.

retiredtab said:
I suggest the following:
1. boot into TWRP and see what the battery % is. If it's not 100%, let it charge to 100%.
2. After charged to 100%, boot into OS and see if it's at 100%.
3. If OS shows 100%, it's fixed. If not, repeat steps 1 and 2 at least 3 more times.
Click to expand...
Click to collapse
ha! will try....

retiredtab said:
I suggest the following:
1. boot into TWRP and see what the battery % is. If it's not 100%, let it charge to 100%.
2. After charged to 100%, boot into OS and see if it's at 100%.
3. If OS shows 100%, it's fixed. If not, repeat steps 1 and 2 at least 3 more times.
Click to expand...
Click to collapse
Still does not charge to 100% outside Twrp.
OK. So in Twrp it goes to 100% and on reboot it says 100% . But then again when it discharge, it will not charge above 76%. I repeated the process, but outside Twrp it does not charge above 76%.
Any ideas??

chappatti said:
Still does not charge to 100% outside Twrp.
OK. So in Twrp it goes to 100% and on reboot it says 100% . But then again when it discharge, it will not charge above 76%. I repeated the process, but outside Twrp it does not charge above 76%.
Click to expand...
Click to collapse
I'll answer the above in the T810 thread since that's what you have, but @lpedia and I have been using the 19.1 T710 since mid April and we would have noticed if it stops charging at 76%. I'll let lpedia comment since he uses the 19.1 T710 as a daily driver more than I do.

New build called lineage-19.1-20221010-UNOFFICIAL-gts28wifi.zip
NOTE: lpedia has personally tested each build on his device to boot and function as described in post #1. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data in TWRP. This is known has a clean install. Backup your data before a clean install.
Oct 10, 2022 release notes
1. YOU MUST read posts 1-4 if you haven't already.
2. Oct 5 security patches as per https://review.lineageos.org/q/topic:S_asb_2022-10

it charges just fine for me

haircut313 said:
it charges just fine for me
Click to expand...
Click to collapse
Just for reference, the charging weirdness was not a device or ROM issue. It was on a T810 (the report of the issue was posted to this thread by accident), and was discussed on the T810 LOS 19.1 thread. It turned out that the device had an app that was interfering with battery charging. Removing that app fixed the problem.

Its working so smooth I like it! The only problem I found is the audio when I play videos in VLC player, didn't play the audio. Can't hear anything. ah! And sometimes my tablet reboots

Kyrat said:
Its working so smooth I like it! The only problem I found is the audio when I play videos in VLC player, didn't play the audio. Can't hear anything. ah! And sometimes my tablet reboots
Click to expand...
Click to collapse
@Kyrat - does VLC audio work otherwise, eg to play music? If not, you probably have the same problem as I came across with some versions of VLC. There's no audio output at all with VLC's default audio output method, AudioTrack. Changing that to OpenSL ES fixed the problem for me.
That setting is in VLC Settings > Extra settings > Audio > Advanced > Audio output.

[UNOFFICIAL][ROM]BETA LineageOS 18.1 for SM-T813 - June 9, 2023

PLEASE BEFORE YOU decide to try this rom, you MUST read all of post 1, 2, 3 and 4 (about 10 minute read). If you think this is an unreasonable request, then stop reading now and find another rom. Thank you.
This is ONLY for the T813. I do not have and will NOT build T713, T719 and T819. See post #2, FAQ 20. Any questions asking to build these will be ignored.
I am not responsible for lost data, identity theft, lost money, security vulnerabilities, bricked devices or any other hardware or software malfunctions that comes as a result of flashing this rom.
BACKUP YOUR DATA AND OLD rom BEFORE trying my rom.
If you are NOT an expert in using fastboot, adb, odin, heimdall, twrp, DO NOT use this rom. You must know how to use these tools to revert back to your old rom. If you are new to flashing custom roms, do NOT attempt this. If you need your tablet for work and something important, do NOT flash this rom. This rom could result in a bricked device or boot loop or non booting device or you not being able to revert back to your old rom.
What works
1. bluetooth
2. wifi
3. brightness
4. external audio
5. GPS
6. audio through headphone jack
7. audio over bluetooth
8. selinux enforcing
9. deep sleep
10 DRM level 3 (SD definition)
Known issues/What doesn't work/what's not tested
NOTE: If any following features are important to you, don't use this rom as I will not be fixing them because I
i. don't use/need that feature
ii. already tried fixing it and couldn't succeed and won't spend anymore time on it.
1. Stock camera doesn't work at all (reason i and ii). Opencamera version 1.51.1 works for taking pictures and videos BUT with a 10 to 15 second delay when switching between functions.
I have not tested any video conferencing apps so they may or may not work. If they don't work, revert back to old rom as I will not be spending anytime trying to fix/troubleshoot.
2. fingerprint (reason i). I never use it and I see it doesn't even load correctly in the logs.
3. ARM64 gapps (reason i). Some of you require gapps for whatever reason. I use Aurora Store for my purposes and thus have NO KNOWLEDGE of the current state of ARM64 gapps.
There are various gapps projects (at least 5 in 2023). Each has pros and cons. It's your job to do the research and find a suitable gapps project. I suggest you allocate at least a couple of hours/days doing your own research. My rom works by itself fine without gapps. DO NOT talk about gapps in this thread. As a courtesy to gapps users, I have opened a new thread at
https://forum.xda-developers.com/t/...o-use-discussion-for-18-1-rom-sm-t813.4540423
so you may discuss gapps. I will NOT be participating in that thread as I do NOT use gapps.
4. disk encryption (reason i). Never tested.
5. If you restart the device with the purpose to reboot it and the usb cable is plugged in, the device will not reboot and stay in charging mode. Simply unplug the usb cable, wait 15 seconds and restart the device.
Source code
All the source code including the kernel is provided in post #2 FAQ1.
Thanks
1. LineageOS team for source code.
The rest in alphabetical order.
2. @Deltadroid for updating the msm8976 kernel for branches 14.1 and 16.0 with bug and security fixes. I'm using his 16.0 branch.
3. @lifehackerhansol for suggesting that I kang the pm-* proprietary blobs from another rom and making suggestions for possible fixes to the camera.
4. Team Infusion Developers github.

FAQ - I spent hundreds of hours building this rom. The least you can do is spend a few minutes reading everything before posting.
Q1. Where are the source and kernel source files?
A1. The kernel source files are at
https://github.com/syphyr/android_kernel_samsung_msm8976/tree/lineage-16.0
The device tree files are at
https://github.com/retiredtab/android_device_samsung_msm8976-common
https://github.com/retiredtab/android_device_samsung_gts210vewifi
The vendor tree files are at
https://github.com/retiredtab/proprietary_vendor_samsung_msm8976
The manifest.xml (or roomservice.xml) and build instructions for 18.1 are at
https://github.com/retiredtab/LineageOS-build-manifests/tree/main/18.1
Q2. Is this BETA rom suitable as a daily driver?
A2. It can be depending on your requirements. I can't test every app so you try it yourself to see if it's suitable. I've been using this rom myself since Oct 2022 with no major issues. I suggest you do a clean install, see FAQ 11, and flash this ROM BY ITSELF (no gapps, magisk, etc) and see if you like it.
Q3. What if my app, xyz, doesn't work?
A3. If your app doesn't work, then go back to your old rom.
Q4. Your rom is laggy and buggy.
A4. If you find the above, then go back to your old rom. Your tablet will also run slower when you use gapps. You can run a lot of software without using gapps. Research fdroid, newpipe, Aurora store etc.
Q5. What TWRP should I use?
A5. You MUST use TWRP 3.6.2_9-0. Do not use any other version for these reasons.
https://forum.xda-developers.com/t/...or-sm-t810-jan-11-2023.4430349/#post-86745013
https://dl.twrp.me/gts210vewifi/
I will not answer questions if you don't use this exact TWRP version.
Q6. Why should I use this rom?
A6. If you don't like this rom, then don't use it.
Q7. Will you offer monthly updates with security patches?
A7. I will try to offer monthly security patches, but that all depends on if I continue to have high speed Internet in the future.
Q8. Can you help me? I'm a newbie. Can you provide step by step instructions?
A8. I don't have the time to help newbies, so please do your own research. There are lots of tutorials, videos, etc on how to flash roms. Newbie questions must be posted in the Questions and Answers forum, not here. In addition, I don't run Windows OS at all.
Q9. Can I report a bug with respect to the rom?
A9. Yes, but you need to supply the following information. If you don't, I won't look at it.
You must provide an adb logcat of the problem and tell me how to reproduce it. Note I will not be downloading any apps that require money or an userid/password. For example, if you have problems with Netflix, I cannot help you since I don't have a paid subscription. If you use some app that requires an userid/password, I cannot help you as I'm not willing to create another userid/password even if it's free.
To get a logcat, open up a terminal window.
Code:
# clear the logcat first
adb logcat -c
# start logcat trace
adb logcat > problem.txt
# reproduce problem
# wait until problem has occured, then stop trace by hitting ctrl-c
# attach the problem.txt ZIPPED as text files don't seem to get attached properly
Q10. Will you build 19.1 and higher for this device?
A10. Any questions on higher Android versions will be completely ignored. I do this in my free/spare time and will not be subject to any ETAs or demands. If you want a higher version, the source code is freely available as per FAQ #1 and you can build it yourself.
Q11. Do I need to erase everything and format my data?
A11. Yes, you MUST erase all the partitions (system, data, dalvik/art cache, cache) using TWRP and MUST format your data before installing 18.1 when you are coming from stock or an earlier version of LineageOS or from another custom rom. If you get stuck at the boot animation for more than 5 minutes, it's likely because you didn't follow the instructions I just wrote. Dirty flashes from stock, other custom roms or older LineageOS versions are not supported and not likely to work.
You MUST FORMAT DATA in TWRP so backup your files first to some external storage (external microsd or PC).
NOTE: After you do the above, first boot (without gapps, magisk, etc) will take about 90 seconds. It may pop with a message saying "System UI isn't responding". Hit close app and then reboot the tablet again.
Q12. What gapps should I use?
A12. I don't use gapps anymore. I use Aurora Store. As of Nov 6, 2021, I no longer make recommendations on which gapps to use as your mileage may vary.
Let me by crystal clear. YOU NEED TO DO YOUR OWN HOMEWORK selecting between the various ARM64 gapps offered. There are 5: opengapps, nikgapps, mindthegapps, flamegapps and bitgapps. Each one will have it's own installation instructions. The only recommendation I will offer to use the SMALLEST version of gapps.
Don't be surprised that whatever gapps you use might have problems like "Just a sec", voice not working, updating google play store please wait, etc. These are NOT problems of the OS as the OS will run fine without gapps. These are gapps problems and you must ask in the gapps forum why it doesn't work.
In addition, some of the gapps may not install properly when using TWRP and say "cannot /mnt/system".
Q13. I'm having problems with gapps, can you answer why it's not working?
A13. I WILL NOT answer any questions regarding gapps. This thread is about the rom, not gapps. Android does not depend on gapps in order to work.
Questions about gapps, for your courtesy, should be asked in the thread below.
https://forum.xda-developers.com/t/...-use-discussion-for-18-1-rom-sm-t813.4540423/
Q14. Why isn't my post answered or ignored?
A14. Questions already answered in the FAQ will be completely ignored. Again, I do not use Windows OS or gapps.
Q15. What speed up/optimization tips do you suggest?
A15.
1. Turn off animations. Go into developer settings, scroll down to the drawing section, and set window, transition and animator scale all to "off".
2. If you don't have a google account, don't install gapps. Use Aurora Store to get your apps as you can get all the same apps from the play store using an anonymous login.
3. Use a web browser like Brave that has built in adblock and privacy features.
4. Use newpipe to watch your streaming content. It has built in adblock so you don't have to watch forced ads.
5. Look for apps that are open source, ad free and lightweight.
Q16. Does this rom support Magisk for root?
A16. I don't use Magisk. Magisk is always being updated to fool Google's certification process which may or may not work.
Q17. Will this rom ever become official?
A17. Never. I don't want the responsibilities that come with being an official maintainer.
Q18. What is the difference between this rom and others?
A18. This rom tries to be pure LineageOS with little to no modifications.
Q19. Will there be any major 18.1 code modifications in the future?
A19. I don't anticipate any major modifications. There may be some small bug fixes and minor code cleanup, but all the hard work in getting the rom up and running and fixing all the major bugs have been completed. This doesn't mean the code is perfect or well organized, but I won't be doing any major changes now that 18.1 is working.
Q20. Can you build a variant of this device? For example, a LTE or S-pen version.
A20. If I don't physically have the device, I cannot and will not build it unless I can boot and test it myself. Even then, there's no guarantee that I can get those variant features working. To be clear, I will NOT build T713, T719 and T819.
Q21. Can I load this rom on a variant devivce like LTE or S-pen version?
A21. The rom is built for the device explicitly listed. If you are an advanced user and understand TWRP, adb, odin, heimdall, you can try loading it on a LTE or S-pen variant by modifying the updater-script, but it may cause a bricked device, bootloops or non functionality of LTE/S-pen. You have been informed and warned!
Q22. Does this rom support OTA updates?
A22. No and I have no plans to add that functionality.
Q23. Okay, I understand the consequences and that this is BETA rom and willing to take the risks outlined, now where can I find the rom?
A23. You can download it from
https://sourceforge.net/projects/retiredtab/files/SM-T813/18.1/

Release Notes
I have personally tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
June 9, 2023 release notes
1. Incorporates June 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-06
2. Whatever LineageOS changed since May 5th patches (about 5,600 files had to be recompiled).
May 7, 2023 release notes
1. Incorporates May 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-05
2. Whatever LineageOS changed since Apr 5th patches (about 6,600 files had to be recompiled).
Apr 15, 2023 release notes
1. Incorporates Apr 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-04
2. Whatever LineageOS changed since Mar 5th patches (about 4,500 files had to be recompiled).
3. Updated aptX code so that it works and stops crashing (broken in 17.1) as per https://github.com/retiredtab/propr...mmit/3f6bd0d979ae25e3ba23e2c214fa7207c81f6b32
March 17, 2023 release notes
1. Incorporates Mar 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-03
2. Whatever LineageOS changed since Feb 5th patches (about 24,000 files had to be recompiled).
3. Added overlay to control capactive key light buttons to enable/disable or change duration as per
https://github.com/retiredtab/andro...mmit/5a2649a040adfb879fd03076f97dd5321c5e27e6
Feb 13, 2023 release notes
1. Incorporates Feb 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-02
2. Whatever LineageOS changed since Jan 5th patches (about 13,000 files had to be recompiled).
3. Updated DRM code so that Disney+ works. See
https://github.com/retiredtab/andro...mmit/6c41d16cf1a8b2e8c436b3bef922a47e606381ee
https://github.com/retiredtab/propr...mmit/fed0f34d48330908165f78051066127b0e1870d8
Jan 7, 2023 release notes
1. Initial release of 18.1
2. Incorporates Jan 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-01
3. If you are upgrading from a custom rom, stock or any older versions of LineageOS (like 14.1, 16.0 or 17.1) YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA in TWRP. You cannot dirty flash at all. Backup your data first.

Reserved #4

I have personally tested all the functionality as to what works as per post #1 before uploading the build. Having said that, there's still a chance it won't work on your device due to human error, your configuration, your apps, etc. If it won't boot, always start with a complete wipe of everything and format your data. This is known has a clean install. Backup your data before a clean install.
18.1 has been my daily driver since Oct 2022.
Jan 7, 2023 release notes
1. YOU MUST read posts 1-4 if you haven't already.
2. Incorporates Jan 5 security patches as per https://review.lineageos.org/q/topic:R_asb_2023-01
3. If you are upgrading from a custom rom, stock or any older versions of LineageOS (like 14.1, 16.0 or 17.1) YOU MUST wipe dalvik/cache, cache, system, data and internal storage partitions in TWRP and FORMAT DATA in TWRP. You cannot dirty flash at all. Backup your data first.

Thanks for all your efforts. I never thought anything above Android 10 would see the light of days on the T813 model, since it was highly neglected here in my opinion. I will definitly try it out

THANK YOU "RETIREDTAB" this is awesome!
I will try it out on my T813 and report back here if there are any problems, Thanks a lot for this rom!!!

@retiredtab, many, many thanks for this rom. Have done a full clean install, the backup of the previous 17.1 took longer. So far everything I need to use is working perfectly. I mainly read the news, pick up emails and buy too much stuff from amazon.
went with the opengapps pico set, and all my google stuff is working, and it restored my apps from the previous backup. Did have some odd issues giving permissions to to the various google apps but once that was sorted it ran.
keep up the good work, and will keep testing

Further update after a weekend of use, the screen off battery drain seems to be minimal(may be Greenify helping) but appears to be better than I had on the previous 17.1 rom. No other issues found as yet.

will the camera issue be adressed or it will stay like that?

Ferchurito said:
will the camera issue be adressed or it will stay like that?
Click to expand...
Click to collapse
I'd say its unlikely to change, far as I know its never been fixed in the previous 17.1 rom either. As retiredtab mentions in point 1, camera use is not a big need or he has alrady tried to fix it and not been able to.

I did everything wrong with a working result:
-My Starting point: LineageOS 17.1 (ripee) installed
- Backup of User Data @ Android System (copy to MicroSD)
- Updated the TWRP version to the recommended in TWRP (coming from ripee version for 17.1)
- Boot to System to ensure it's still working
- Backup everything in TWRP
In one batch without booting in between:
- I dirty flashed "lineageOS 18.1" over "lineageOS 17.1 (from ripee)"
- Flashed the Arm64 version for Android 11 of "mindTheGapps" over existing "OpenGapps (for Android 10)"
- Flashed Magisk *.zip
- Deleted Cache and Dalvik
Boot to system and it's working perfectly so far
FYI.: Camera App "ProcamX" is working as well.
FYI.: Especially for lineageOS 17.1 users: I can confirm GPS is working (GPS Test Plus)
For sure I wouldn't recommend this procedure and maybe I will do a clean install later to gain smoothness and to make it stable in general but so far it's super nice, no bootloop, random restarts (BUT it's based on a few hour usage only) or whatever and a big thank you to ritiredtab

I have Magisk and safetynet pass flashed. I can download Netflix from Playstore but it doesn't play any content. It seems that Widevine / DRM is not part of the ROM at all as the App "DRM Info" doesn't show any Widevine information. In consequence Netflix doesn't play and stuck in "loading". Anyway it seems to enable some old DRM blobs can fix the issue like at least for L3 which is SD playback. Something like here needs to be added I think....:
https://review.lineageos.org/c/LineageOS/android_device_moto_shamu/+/339185
Didn't dig deeper into the topic so far. Just want to share the info.

Renzke said:
It seems that Widevine / DRM is not part of the ROM at all as the App "DRM Info" doesn't show any Widevine information.
Click to expand...
Click to collapse
As I listed in post #1, DRM L3 works as I check/test/verify ALL my public xda builds for the functionality in post #1 before uploading.
Here's the results of checking DRM with 4 different programs. Devcheck by flar2 is what I use to check all my ROMS for a variety of values and widevine DRM L3 (along with clearkey) is clearly shown. Device Info HW and DRM Check also show widevine properly.
DRM Info by Android Fung is the only one that cannot show the widevine information which may be due to a bug in this program or it's poorly written and being denied by selinux enforcing.
DevCheck and Device Info HW are both ad free while DRM Check and DRM Info are infested with ads. The latter 2 are programs I will never use again.
In addition, DRM Info by Android Fung shows this in the logcat
Code:
GooglePlayServicesUtil: com.androidfung.drminfo requires the Google Play Store, but it is missing.
As I mentioned several times, I do NOT and will NOT install any gapps.
Your link to gerrit regarding DRM is already in my code (done a bit differently, but works as clearly shown by Devcheck).
https://github.com/retiredtab/propr...mmit/92ecf0f7615a291281e4b39da6be956e92e66d82
https://github.com/retiredtab/andro...mmit/5a91ac3d5d14510b335f8d6ec650b254edcdb2dc

@retiredtab Thanks for the detailed reply. You are right. I See Widevine L3 in other Apps as well. Shame on me '-'. Even Netflix itself gives this Info... Anyway... Playback is not starting while preview videos are working. Tried already a couple of versions without success and checked the permissions. As I'm customized with Magisk the rootcause could be on my side for sure. Prime Video is working by the way. Would be nice to know if a clean install has the same behaviour.

Renzke said:
@retiredtab I See Widevine L3 in other Apps as well.
Click to expand...
Click to collapse
There's a reason why I always recommend clean installs. When you don't do it, it leads to unexplained problems. If Prime is working, that suggests DRM L3 is working.
If a clean install doesn't work with Netflix, then see FAQ 9 and send me the logs (zipped). There's no guarantee that it will show anything wrong or if I can fix it. I don't have/use Netflix or any other $treaming service.
Having said that, I do build other roms like the T810 (S2 2015 exynos model) and others have commented that they do not need Magisk hide, root, etc to get Netflix shown in the playstore because my T810, like this T813, is selinux enforcing. They report that the T810 shows up as "device is certified".
Again, since I don't use gapps, I cannot confirm if "device is certified" is true for T813, but if it is, then Netflix should show up without Magisk/hide, root, etc. If it does show up, it's a bonus. If the T813 shows up as "device not certified", I have no plans to fix this as I don't use gapps.

@retiredtab I'm not sure if I will do a clean install as the system is working quite well expect Netflix and at the end of the day it's not super important for me. In case I do a clean install I will provide a log and be thankfull for the offer to fix things
The chances to have an indication is maybe low in the logs as Netflix loops in the loading screen without an error at all. Anyway I don't want to waste your time with this topic currently as I cleary didn't follow your instructions by doing a dirty flash and so on. And again... Super nice to have this rom which gives my tablet a 2nd life. Thanks a lot.

Renzke said:
@retiredtab I'm not sure if I will do a clean install as the system is working quite well expect Netflix and at the end of the day it's not super important for me. In case I do a clean install I will provide a log and be thankfull for the offer to fix things
The chances to have an indication is maybe low in the logs as Netflix loops in the loading screen without an error at all. Anyway I don't want to waste your time with this topic currently as I cleary didn't follow your instructions by doing a dirty flash and so on. And again... Super nice to have this rom which gives my tablet a 2nd life. Thanks a lot.
Click to expand...
Click to collapse
I don't really care about using Netflix on this device, but figured I'd let you know that I'm having the same issues after a clean flash. Will try and grab a log later.

I have this strange problem
I have two tablets SM-T813 and SM-T819.
I installed Lineage os 18.1 on SM-T813 and SM-T819 (I modified the installer). On the T813 it booted without any problems. On the T819, on the other hand, it stands in bootloop. I went into recovery and there were no files in INTERNAL STORAGE, it was empty. To T819 I need to install some file or something so that it can start reading Memory and come out of bootloop?

K-BOX2022 said:
On the T819, on the other hand, it stands in bootloop.
Click to expand...
Click to collapse
As I mentioned in the FAQ, there's nothing I can do without the T819 physically in my hands. If the T813 worked on T819, then it's a bonus. If not, it was worth a try.