Galaxy Tab S2 not booting properly. - Galaxy Tab S2 Q&A, Help & Troubleshooting

Hello everyone,
I recently wanted to root my galaxy tab s2 and install a custom rom on it to enhance performance, someting i've done before with my old phone where everything worked fine. So i used autoroot to root the tablet which worked fine and choose to install lineageos afterwards. i found a fitting version of lineage on their official website, installed twrp on my tablet and used it to install lineageos and GApps. However i did not unlock my bootloader using adb since i didnt have to do that back when i rooted my phone and i read on a forum that unlocking oem in the developer settings would be enough. This is where the problems start. After i installed the custom rom the tablet would try to boot into the os for a couple of minutes only showing a loading animation just to boot straight into recovery mode afterwards. In an attempt to fix the error i used odin to install a stock rom from sammobile on the tablet. However now it doesnt even boot into recovery anymore. instead it only shows the stock rom loading animation until the battery emptys. Though i can enter download mode from that position and then cancel it in order to reboot the device which enables me to enter recovery mode. Does anyone have an idea how i could boot a normal os again or is the device hard bricked? The only idea i have left is trying to install a new os from an sd card.

I have the same issue. I installed unofficial lineageos 16 to exynos 2015 t810. I have newest odin and twrp. Im wondering if i need to install or unlock the bootloader to get past the logo loop then recovery bootup after 5 minutes. I followed clean tutorials.
Update: i found this to try.
Quote:
Originally Posted by -beluga-
Hi, first of all thanks for the ROM. Unfortunately I am unable to get my T710 running properly with today's packages (it ran 15.1 so far)
- lineage-16.0-20191009-UNOFFICIAL-gts28wifi.zip
- addonsu-16.0-arm-signed.zip
- open_gapps-arm-9.0-pico-20191009.zip (some with nano or stock)
I am doing a full clean install every time (over 10x so far) but only get it to boot using the ROM alone. Any mod, such as addonsu, gapps or even trwp app cause it to show the Lineage boot screen for quite a while until dropping back into TWRP. Since there is a virtually infinite amount of permutations which versions to try - can someone who is successfully installed 16.0 with Gapps on a T710 let me know their version combination please?
Thanks.
pico-20191009 is giving problems with the 1009 build on my T810 too. Pico-20191006 and Magisk 19.4 are doing the trick for me.
Don't know about other combinations
BTW, it's advised not to install the TWRP app as it is known for causing bootloops on this rom.
Don't know for sure, but wiping internal storage before installing rom might be useful too.

Related

looping on "unforunately system ui has stopped"

So today I received a XT 1056. I then proceeded to unlock the bootloader and flash SU.
So I then tried flashing a CM 12 nightly build and all went well. I was able to setup the device until the screen was locked and then the phone instantly starts looping through the "Unfortunately, system UI has stopped." error. I've tried flashing an older version of the ROM, and I've tried numerous other 5.0 ROM's but each one will crash as soon as the screen is locked.
And it would not seem like a great idea to revert to an older version of Android and risk bricking the device.
So if someone could advise me how to get rid of the loop error it would be much appreciated.
I have TWRP 2.8.3 currently flashed if that makes any sort of difference....
Install the gApps...
690sid said:
Install the gApps...
Click to expand...
Click to collapse
I tried a fresh install of this CM12 with the gapps it says to use and once again I can setup the phone and as soon I get to the home screen the system UI loop happens. http://forum.xda-developers.com/moto-x/development/rom-unofficial-nightly-lollipop-5-0-t2960768
I also saw your post in that thread to try flashing with these instructions, but it still has the same error.
1 - Download an earlier version of the ROM that booted on you phone along with the gapps.
2 - Flash the ROM and gapps with a suitable recovery... CWM or TWRP 2.6.
3 - Download the latest release that you want to install.
4 - Flash the latest release over the pre - installed ROM without wiping anything.
Is it possible to just flash 4.4.4 or do I risk bricking the device?

Cyanogenmod 13 no longer boots (but stock does)

This just started a couple days ago. I rebooted the phone after SuperSU updated its binary, and the phone would not boot past the "starting apps" screen. I've tried everything I can think of - disabling systemless root and Xposed, upgrading CM 13, downgrading it, wiping everything and doing a fresh install, restoring stock 20i with TWRP and reinstalling CM... nothing works. It either hangs on the boot animation or the "starting apps" screen. I finally managed to get stock 20o loaded with the KDZ method and everything seems to work, but I would really like to have CM back. Can anyone help?
Same issue here, was running resurrection remix, powered off to swap battery and stuck at starting apps. Went back to stock and it works.
I had the same issue after updating the SuperSU binary following the flash of the latest nightly. Here is what I did to get CM13 back:
Flashed 20o kdz via LGUP - http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Booted Stock Rom - Set Developer options on and enable OEM unlocking and USB debugging
Added TWRP - http://forum.xda-developers.com/tmo...ck-guide-h811-20-o-bootloader-unlock-t3421589
Booted Stock Rom
Reboot to Recovery
Flashed CM13 via TWRP
Booted CM13
Enabled Developer options ensured OEM unlock and Usb debugging were enabled (Debugging was for Titanium Backup). Also, extended boot menu (for ease)
Reboot to Recovery flash additional items (SuperSU, Gapps, Xposed) Note: I flashed each one individually and booted (wanted to check each for functionality after this mess)
Let me know if you have questions, I'll be happy to try and help.
Cheers!
My phone is functional again, I didn't notice originally but even with the stock flash I had no sound, sensors or camera. I ended up flashing the KDZ and reinstall RR and everything is normal again. Follow the step Surly33 posted and you should be fine.
Thanks a TON surly33 and Pantslessape !!!!
Struggled all day yesterday and half of today, trying to get it working again...
Wonder what was the problem?
I wonder if something changed in SuperSU 2.78 and we should stick with 2.76.
Thanks Surly33, I will try it and see how it goes.
I flashed CM and GApps, and all seems to be working. Gonna try it with just the stock su for now. Thanks
Worked like a charm
Surly33 said:
I had the same issue after updating the SuperSU binary following the flash of the latest nightly. Here is what I did to get CM13 back:
Flashed 20o kdz via LGUP - http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Booted Stock Rom - Set Developer options on and enable OEM unlocking and USB debugging
Added TWRP - http://forum.xda-developers.com/tmo...ck-guide-h811-20-o-bootloader-unlock-t3421589
Booted Stock Rom
Reboot to Recovery
Flashed CM13 via TWRP
Booted CM13
Enabled Developer options ensured OEM unlock and Usb debugging were enabled (Debugging was for Titanium Backup). Also, extended boot menu (for ease)
Reboot to Recovery flash additional items (SuperSU, Gapps, Xposed) Note: I flashed each one individually and booted (wanted to check each for functionality after this mess)
Let me know if you have questions, I'll be happy to try and help.
Cheers!
Click to expand...
Click to collapse
So happy that Xda developed me into someone who could help others! Cheers family!
Mogster2K said:
I flashed CM and GApps, and all seems to be working. Gonna try it with just the stock su for now. Thanks
Click to expand...
Click to collapse
Also, on SuperSU 2.78 with no issues
Surly33 said:
Also, on SuperSU 2.78 with no issues
Click to expand...
Click to collapse
i wonder what went wrong
Mogster2K said:
This just started a couple days ago. I rebooted the phone after SuperSU updated its binary, and the phone would not boot past the "starting apps" screen. I've tried everything I can think of - disabling systemless root and Xposed, upgrading CM 13, downgrading it, wiping everything and doing a fresh install, restoring stock 20i with TWRP and reinstalling CM... nothing works. It either hangs on the boot animation or the "starting apps" screen. I finally managed to get stock 20o loaded with the KDZ method and everything seems to work, but I would really like to have CM back. Can anyone help?
Click to expand...
Click to collapse
So I had this same problem happen to me. I happened to have a complete TWRP backup including all partitions from right after I unlocked the SIM and bootloader. I wiped everything including the SD Card then restored the backup and it's still having issues.
After restoring the backup I was able to get the SlimROM to boot but during the setup the phone locks up. I will try reinstalling Cyanogenmod to see if I encounter the same problem with that, but it doesn't seem like SuperSU 2.78 is the common denominator because I was running that version since it's release and only started having problems yesterday.
Meh Same here
Was running the nightly from 160920, had downloaded but not installed latest nightly 160930, before I had a chance to install it, phone locked up. Figured ok, maybe something I flashed? ( although last thing I flashed and or changed was on the 21st) so reflashed my previous backup of CM13 with just Cm13 installed, no extras or additions, and phone locked up again.
Stuck at the Starting apps screen.
Recharging my battery now and gonna reflash stock which Suuuuuuuuuuxxxxxxxxxxxxx :crying:
Meh dbl meh.
Anybody figure it out yet?
shadow813 said:
Was running the nightly from 160920, had downloaded but not installed latest nightly 160930, before I had a chance to install it, phone locked up. Figured ok, maybe something I flashed? ( although last thing I flashed and or changed was on the 21st) so reflashed my previous backup of CM13 with just Cm13 installed, no extras or additions, and phone locked up again.
Stuck at the Starting apps screen.
Recharging my battery now and gonna reflash stock which Suuuuuuuuuuxxxxxxxxxxxxx :crying:
Meh dbl meh.
Anybody figure it out yet?
Click to expand...
Click to collapse
This happened to me when I flashed the CM 20160929 nightly on top of the 20160928 nightly. I was encrypted and I had been running SuperSU 2.78 since it released. Updating my phone to the 20o base fixed the problem and I took the opportunity to switch to the SlimROM6 port since CM decided they don't really want to get around to release a stable build of CM13 so that bug reports can be submitted. At least now I can toggle data on and off in the quicksettings pulldown. The downside is I have to re-setup all my accounts and stuff but on the upside I had been meaning to do this anyway as I encrypted and TWRP still can't decrypt properly (amongst other time zone bugs) to run backups and such.
I was on Stock 20i before I initially installed CM 13. Maybe something changed in CM 13 so that it won't boot unless Stock 20o gets installed. I know there's more to it than just the boot and system images that custom ROMs use. (I count 57 separate partitions and I have no idea what most of them do.) The Stock 20o KDZ seems to contain 27 of them.
I was on Stock 20i before I initially installed CM 13. Maybe something changed in CM 13 so that it won't boot unless Stock 20o gets installed. I know there's more to it than just the boot and system images that custom ROMs use. (I count 57 separate partitions and I have no idea what most of them do.) The Stock 20o KDZ seems to contain 27 of them.
Click to expand...
Click to collapse
I think there was a boot loader compatibly issue with SuperSU and 20i. But, that is just a guess.
Surly33 said:
I had the same issue after updating the SuperSU binary following the flash of the latest nightly. Here is what I did to get CM13 back:
Flashed 20o kdz via LGUP - http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Booted Stock Rom - Set Developer options on and enable OEM unlocking and USB debugging
Added TWRP - http://forum.xda-developers.com/tmo...ck-guide-h811-20-o-bootloader-unlock-t3421589
Booted Stock Rom
Reboot to Recovery
Flashed CM13 via TWRP
Booted CM13
Enabled Developer options ensured OEM unlock and Usb debugging were enabled (Debugging was for Titanium Backup). Also, extended boot menu (for ease)
Reboot to Recovery flash additional items (SuperSU, Gapps, Xposed) Note: I flashed each one individually and booted (wanted to check each for functionality after this mess)
Let me know if you have questions, I'll be happy to try and help.
Cheers!
Click to expand...
Click to collapse
Haha, this happened to me like 3 weeks ago too. I ended up doing this after like 3 hours of messing around with the phone. I wish i would have just saw this instead of figuring it out on my own haha

A Bit of a Complex Issues Involving TWRP, SuperSU, and not being able to restore OS

So, I recently installed TWRP on my SM-T813. I then flashed LineageOS 14.1 successfully, but didn't like it, so I reflashed stock ROM. Everything was working fine, until I tried to install SuperSU on my stock ROM.
Now, my tablet is stuck into booting recovery mode, and cannot boot into the ROM (although Download Mode is still usable, more on that later). Upon trying to reflash the backup again, and attempting to reboot, TWRP states "No OS installed!" SO I tried reflashing the LineageOS ROM, same thing. Upon trying to restore a firmware with Odin, I get an error saying "SW REV CHECK FAIL aboot Fused 2 Binary 1." After finding no answers, I delved into my SD card and found that I had flashed the WRONG version of SuperSU, although it had been cleared when reformatting with TWRP. I then tried using the CORRECT SuperSU, and I am still stuck in recovery bootloop.
Can someone analyze what's going on and see what the problem is?
(SM-T813 - USA)
Lucarje said:
So, I recently installed TWRP on my SM-T813. I then flashed LineageOS 14.1 successfully, but didn't like it, so I reflashed stock ROM. Everything was working fine, until I tried to install SuperSU on my stock ROM.
Now, my tablet is stuck into booting recovery mode, and cannot boot into the ROM (although Download Mode is still usable, more on that later). Upon trying to reflash the backup again, and attempting to reboot, TWRP states "No OS installed!" SO I tried reflashing the LineageOS ROM, same thing. Upon trying to restore a firmware with Odin, I get an error saying "SW REV CHECK FAIL aboot Fused 2 Binary 1." After finding no answers, I delved into my SD card and found that I had flashed the WRONG version of SuperSU, although it had been cleared when reformatting with TWRP. I then tried using the CORRECT SuperSU, and I am still stuck in recovery bootloop.
Can someone analyze what's going on and see what the problem is?
(SM-T813 - USA)
Click to expand...
Click to collapse
This has been posted a million times all over the forum. A quick search here or Google would have revealed the answer
You need to flash a revision 2 firmware. So that would be something like t813xxu2 in the firmware build number.
Sorry for being late with reply. Your advice helped me fix my tablet! Thanks so much!

T713 bootloop with official firmware

I used my tab with Lineage os 15.1 with no problem.
It started, when one time my battery drained. After charging
it couldnt boot up, it booted to download mode.
Then I tried to flash an official firmware, but it stuck at tab s2 screen.
I tried it after wipe of course, the same.
Then I tried flash TWRP, its working, but I cant install any custom rom,
because I got an error (for exemple error 7).:crying:
Any idea?

How to flash ASOP based ROMs?

Hi
A few months ago I was able to flash on angelica lineage-17.1-20210326-UNOFFICIAL-angelica.zip and this worked well. Yesterday I tried to flash the s same image again and after several attempts I get a black backlit screen when lineage is meant to start. I reflash stock _V12.0.10.0.QCRMIXM then a recovery - PBRP 3.0.1. From there I was having issue
What is the flashing process for an unlocked device that has something like TWRP/Pitch Back/Orange Fox installed?
I guess once you unlock and can flash the recover you use the recover to flash the zip, then reboot and flash magisk.zip and everything should work? Or is there some step missing.
I had this problem too with the google pixel 7 pro. Can't help ya there on that one. I even tried re installing older firmware and it still didn't work. Maybe the bootloader is permanetly downgradable but the firmware of the stock is. Just a guess. Lineage os 20 is an unofficial build at the moment that receives hardly any updates.

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