Database Develop

[Q] what's Kernel???

Here's a dumb question... I thought a kernel is incorporated with a certain rom. But when i read thru the dev thread, it sounds like there are different version of kernels and we can install different Kernels to different roms??? What exactly do the Kernels do? What would make the differences? Thanks in advance.

Kernels control the resources and filing system of the phone. Different kernels have different lag fixes, some over clock the processor. Some kernels re-orientate roms so i9000 roms work on the captivate.

He also makes some kick ass chicken. Sorry, couldn't help myself.
http://en.wikipedia.org/wiki/Kernel_(computing)

mcord11758 said:
Kernels control the resources and filing system of the phone. Different kernels have different lag fixes, some over clock the processor. Some kernels re-orientate roms so i9000 roms work on the captivate.
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So, would you say the kernel makes a rom work on a specific phone ???

minlee85 said:
So, would you say the kernel makes a rom work on a specific phone ???
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In some cases but they accomplish more then that

minlee85 said:
So, would you say the kernel makes a rom work on a specific phone ???
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Android relies on Linux version 2.6 for core system services such as security, memory management, process management, network stack, and driver model. The kernel also acts as an abstraction layer between the hardware and the rest of the software stack.

Stock kernel vs custom kernel ?

Stock kernel vs custom kernel ?

mohnad12 said:
Stock kernel vs custom kernel ?
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what about it? what's your real question? stock is however stock is set up, custom kernels change the CPU setup, in many differing ways. there is no one correct answer as there are many different custom kernels and setups.

simms22 said:
what about it? what's your real question? stock is however stock is set up, custom kernels change the CPU setup, in many differing ways. there is no one correct answer as there are many different custom kernels and setups.
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I am running orignal android 6.0.1 its recommanded to install custom kernel ??

mohnad12 said:
I am running orignal android 6.0.1 its recommanded to install custom kernel ??
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if you have issues with the stock kernel, yes. if you want root, yes. should you learn how to set up your cpu properly before changing kernels? yes. learn about the governor/scheduler, how changing them changes your cpu performance. besides that, some kernels add a few minor features as well.

Rooted but as close to stock as possible. I've always had issues with heavily tweaked custom kernels.
They have their place, but not if you wan't a solid rooted daily driver IMHO.

DaanJordaan said:
Rooted but as close to stock as possible. I've always had issues with heavily tweaked custom kernels.
They have their place, but not if you wan't a solid rooted daily driver IMHO.
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im a well known custom kernel user, and yet I NEVER use any custom kernel as they are set up by the developer. I ALWAYS use my own CPU setups, always. as far as I can tell, my setup is as solid for me as any stock kernel that google provides. but not only solid, my phones performance is kicked up a notch as well as its battery life. and my devices turn out much more responsive too.

Wow you must be very skilled and talented!
Sometimes messing with stuff like that can create bootloops and random freezes.
I also love how you have contributed to this thread by saying how you ALWAYS use your own CPU setups.
It was very informational an helpful.
Thanks!

DaanJordaan said:
Wow you must be very skilled and talented!
Sometimes messing with stuff like that can create bootloops and random freezes.
I also love how you have contributed to this thread by saying how you ALWAYS use your own CPU setups.
It was very informational an helpful.
Thanks!
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and that's why its very important to know about governors and schedulers.
here's one of my examples.. for a long time, I was the only one using all 4 cores on , no hotplugging. and many people laughed at me about it, claiming my battery life must suck. but, for android 5.1 google changed the CPU settings for the nexus 6. and many people really noticed about how reactive the n6 became. what did google change? they set the cpu to be always on, no hotplugging :angel:
BTW, I use the ondemand governor with the deadline scheduler. with the sampling rate for ondemand set at 15000 and the sampling rate at 98.

mohnad12 said:
Stock kernel vs custom kernel ?
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Ribs barbecue.
---------- Post added at 10:22 AM ---------- Previous post was at 10:21 AM ----------
mohnad12 said:
I am running orignal android 6.0.1 its recommanded to install custom kernel ??
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No. Stock just works fine.

Best kernel for both battery & performance

I'm so confused that which kernel is the best one for oos 4.0.3?!??
Franco, ElementalX, or Blu_spark?

nimamusic said:
I'm so confused that which kernel is the best one for oos 4.0.3?!??
Franco, ElementalX, or Blu_spark?
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Or xceed?...
Or boeffla?

Honestly, a lot of it is going to be subjective, it depends on the kinds of apps you use, whether or not you tweak the governors and settings or not, whether you are using an app to make doze more aggressive, etc...
Most of it is going to have to involve some trial and error from you

I'm using Franco. It seems OK and I can get 5 hours SOT which is enough for me. I asked the same question before and I was told that EX is more customizable and Franco is more easy to use, it's just flash and forget.
Sent from my ONEPLUS A3010 using Tapatalk

cultofluna said:
Or xceed?...
Or boeffla?
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where is xceed?

N173M43R said:
Honestly, a lot of it is going to be subjective, it depends on the kinds of apps you use, whether or not you tweak the governors and settings or not, whether you are using an app to make doze more aggressive, etc...
Most of it is going to have to involve some trial and error from you
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That's true, but When i search the forum, some people have problem with some kernels
I wanna the kernel without bugs

nimamusic said:
That's true, but When i search the forum, some people have problem with some kernels
I wanna the kernel without bugs
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Almost none of the problems reported in the kernel threads are kernel related. Most are either from none stock roms, root, magisk, modules and other stuff people flash on top. I personally tried stock, elemental and franco's kernel. None had any Problems what so ever. I personally chose franco because I've been with him for years. He's a great guy and supports his kernel and app with great effort. From a pure performance/battery standpoint i haven't found much differences. But i also run my personal settings, so... :good:

domsch1988 said:
Almost none of the problems reported in the kernel threads are kernel related. Most are either from none stock roms, root, magisk, modules and other stuff people flash on top. I personally tried stock, elemental and franco's kernel. None had any Problems what so ever. I personally chose franco because I've been with him for years. He's a great guy and supports his kernel and app with great effort. From a pure performance/battery standpoint i haven't found much differences. But i also run my personal settings, so... :good:
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Wow! Thanks a lot:good::fingers-crossed:

masri1987 said:
where is xceed?
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https://forum.xda-developers.com/oneplus-3/development/kernel-xceed-t3515248

OxygenOS after custom ROM?

I am considering to install a custom ROM on my OP 3T. I do have one question. Cause I like oxygenOS but I just want to try something else, but when installed am I able to revert back?

Sadly,nowadays custom roms brings more harm than good.

Midomad said:
Custom roms brings more harm than good,PERIOD.
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@Midomad I Devine something as MIUI for example as custom ROM. Does this still apply to your statement?
https://forum.xda-developers.com/oneplus-3t/how-to/miui-8-wu-edition-t3532347

tribeldragon said:
@Midomad I Devine something as MIUI for example as custom ROM. Does this still apply to your statement?
https://forum.xda-developers.com/oneplus-3t/how-to/miui-8-wu-edition-t3532347
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Oxygen OS is the best ROM/OS i ever used.

Midomad said:
Oxygen OS is the best ROM/OS i ever used.
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Alright. Little of topic but do you have your phone rooted?

tribeldragon said:
Alright. Little of topic but do you have your phone rooted?
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Yes and using a custom kernel as you can see on my signature.

Midomad said:
Yes and using a custom kernel as you can see on my signature.
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What does this kernel do any extra then the one I have(probely stock)

tribeldragon said:
What does this kernel do any extra then the one I have(probely stock)
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Do some search on the respective threads,and welcome to XDA.

Midomad said:
Do some search on the respective threads,and welcome to XDA.
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Alright, thank you for your answers

tribeldragon said:
Alright, thank you for your answers
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Use the thanks button instead [emoji111]

Custom roms don't cause any harm at all.

Midomad said:
Custom roms brings more harm than good,PERIOD.
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that was a subjective question and this is an inappropriate response
it depends on what you want out of a ROM and what your stock ROM is like. if a stock ROM doesn't suit your needs, sometimes there is an appropriate ROM for you. i have rooted every samsung device i have ever had and improved my experience greatly.
when you find a good developer, custom ROMs can be better. stock is usually most stable

WaxysDargle said:
that was a subjective question and this is an inappropriate response
it depends on what you want out of a ROM and what your stock ROM is like. if a stock ROM doesn't suit your needs, sometimes there is an appropriate ROM for you. i have rooted every samsung device i have ever had and improved my experience greatly.
when you find a good developer, custom ROMs can be better. stock is usually most stable
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I wonder what you want out from a rom?we are using/talking about OOS and that's suit my needs(It has all that is missing in stock android).
Sorry but Samsung software is garbage.
Midomad said:
As Android is further refined, there are fewer and fewer reasons to use a custom ROM for most users,custom ROMs will always be relevant to entry-level/midrange smartphone users, or those who still use older devices, that aren't receiving official updates from OEMs anymore.
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Midomad said:
I wonder what you want out from a rom?we are using/talking about OOS and that's suit my needs(It has all that is missing in stock android).
Samsung software is garbage.
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OOS seems to have everything i want in a ROM too.
that being said, i may find features that i want and don't have. my moto has pretty much everything i could want, but updating to a custom 7.1.1 increased the performance of my device so much that i can't imagine going back.
i haven't used any custom ROMs for OP3T yet, but from what i'm reading we have some really good devs and it is worth a shot. for instance, RR offers customization to such granularity that i will try it because that customization leaves me feeling like i actually own the device (basically the opposite of what apple does with their products)

Should i flash a custom rom?

Hello, so I'm asking if I should flash a custom ROM instead of keeping my OOS 4.1.3?

U have to try man. It's clear thing for this device.

Thunderbolt said:
U have to try man. It's clear thing for this device.
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What roms do u recommend? Ive flashed RR on my mom's galaxy s5, it looks pretty good

idubis said:
What roms do u recommend? Ive flashed RR on my mom's galaxy s5, it looks pretty good
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One of available versions of RR, phoenix AEX, official AEX, Dirty Unicorns. Today im back to Phoenix AEX, it is a great, stable and fast rom with great developer.

idubis said:
Hello, so I'm asking if I should flash a custom ROM instead of keeping my OOS 4.1.3?
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This is so vague, as it tells us nothing about what features you may be looking for, why you want a custom ROM, etc.
If you are just looking for something different, then sure, go for it. Similarly, if certain features of a custom ROM (or ROMs) look attractive, then go for it. There is really no downside, as unlocking the bootloader does not void the warranty. And reversing any changes (returning to stock) is pretty easy as well.
On the other hand, stock OOS is amazingly good. Very little bloat or skinning, but with the right amount (IMO) of customization added. Many folks (myself included) accustomed to flashing custom ROMs to get the most out of their device, have been just happy with stock OOS. But of course, there is always room for improvement, tweaking, etc.
It's an individual choice. Most users of Android devices will never flash a custom ROM. Majority probably don't even know what that means.

idubis said:
Hello, so I'm asking if I should flash a custom ROM instead of keeping my OOS 4.1.3?
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First determine what you`re missing in stock OOS, find those features in a custom rom/kernel and flash it. Done

gee2012 said:
First determine what you`re missing in stock OOS, find those features in a custom rom/kernel and flash it. Done
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I want something different, and good battery life

idubis said:
I want something different, and good battery life
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Its not just a rom or kernel that makes great batterylife, mobile reception strenght (modem ) and usage (apps, syncing, gaming yes or no) are vital too.

I'd go with FreedomOS or RRemix. Really LineageOS is mostly placebo battery fixes and an overabundance of customization options. Most of the lineage roms outside of RRemix are very unstable or just kinda useless. Hate to say it cuz some devs put lots of time in but Ive always found worse battery life with the same usage patterns on anything but stock.

OcazPrime said:
I'd go with FreedomOS or RRemix. Really LineageOS is mostly placebo battery fixes and an overabundance of customization options. Most of the lineage roms outside of RRemix are very unstable or just kinda useless. Hate to say it cuz some devs put lots of time in but Ive always found worse battery life with the same usage patterns on anything but stock.
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Oh. That's bad. I want to use a custom ROM. But if Oxygen is so much better?!?!? :silly:
No good ROM available?

Well Oxygen OS was made for this specific phone in mind remember. So of course it fares best.

I don't know. Perhaps lineage with sultan kernel is an option.
I try to find the best ROM with great battery life, performance, stability, features etc. Any recommendations?
Phoenix is good, Resurrection remix also, but how is battery life and performance? So many features in it...

derAndroidler said:
Oh. That's bad. I want to use a custom ROM. But if Oxygen is so much better?!?!? :silly:
No good ROM available?
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In the time you've been waiting around for someone to make a decision for you; you could have just unlocked the bootloader and flashed a ROM (of even more than one) and be trying it yourself.
Just make a TWRP backup of the stock ROM (or otherwise, know how to return to stock with the official zip file) and you can easily revert if you don't like the ROM you flashed.
No point in waiting for someone else to tell you what to do. Everyone's opinion and preference is going to be different. Just because someone tells you to flash a ROM or not (or which one), doesn't mean that is the right answer for you as an individual.
Even things like battery life and performance are going to vary drastically depending on how you as an individual use your device (as others have also mentioned). Then also throw in the differences in personal preferences and tastes; and the result is that you can't go by the direction of others. You need to decide for yourself.

redpoint73 said:
In the time you've been waiting around for someone to make a decision for you; you could have just unlocked the bootloader and flashed a ROM (of even more than one) and be trying it yourself.
Just make a TWRP backup of the stock ROM (or otherwise, know how to return to stock with the official zip file) and you can easily revert if you don't like the ROM you flashed.
No point in waiting for someone else to tell you what to do. Everyone's opinion and preference is going to be different. Just because someone tells you to flash a ROM or not (or which one), doesn't mean that is the right answer for you as an individual.
Even things like battery life and performance are going to vary drastically depending on how you as an individual use your device (as others have also mentioned). Then also throw in the differences in personal preferences and tastes; and the result is that you can't go by the direction of others. You need to decide for yourself.
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Thanks. I already tried some ROMs. But I can't decide.
Are there big differences in battery life?

derAndroidler said:
Thanks. I already tried some ROMs. But I can't decide.
Are there big differences in battery life?
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If you are still asking that question, then you missed one of the main points of my last post:
redpoint73 said:
Even things like battery life and performance are going to vary drastically depending on how you as an individual use your device
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Plus others (more than one) on this thread have already answered the question (of battery life on the various ROMs).

No
Sent from my OnePlus 3T using XDA Labs

@redpoint73
You're right. It's only so difficult to decide, because here are so many ROMs and kernels and they are all similar and I want a good daily driver and don't want to change it the next years.

derAndroidler said:
@redpoint73
You're right. It's only so difficult to decide, because here are so many ROMs and kernels and they are all similar and I want a good daily driver and don't want to change it the next years.
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If you're so concerned about battery life, beta 7 + Franco kernel

sakumaxp said:
If you're so concerned about battery life, beta 7 + Franco kernel
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I will try lineage with sultanxda kernel. I hear it has amazing battery life.
I also like Resurrection Remix , but I suppose, it has bad battery life, but I'm not sure.

I've tried a handful of roms... they're all just fine in my opinion but I seem to always end up back on the Oxygen stock rom. I root, but that's about it. I just can't get over how well Oxygen OS is running these days compared to my OP2 ... Just flash and try! You won't hurt anything, and if you do you have a 99% chance of fixing it!