This kernel aims to be an alternative (and experimental) to Stock or custom ROMs (CM, Bliss,...) default ones, applying tweaks (kernel source configuration) and patches (if them apply) to improve general responsive, performance and functionality.
*Remember, test at your own risk.
BitO-KU
Base "pure" kernel with latest Nvidia code + Linux upstream (v3.10.108)
More info here.
Main Features for K12:
SafetyNet bypass (TESTING)
Latest Linux 3.10.108 code fully merged
Latest F2FS code backported from Linux 4.10
Multi Core and SMT optimizations enabled
Extra IO Schedulers (CFQ - default)
Extra Governos (Interactive - default)
Extra TCP Congestion algorithms (Cubic - default)
L2TP VPN enabled
ZRAM with LZ4 enabled (you can disable)
NTFS RW enabled
UTF8 as default code table
Module support disabled
CPUQuiet (CPU dynamic hotplug)
Main Features for KX10:
All K10-001 features + ...
OC for CPU and GPU (thx to @laufersteppenwolf )
Other optimizations:
Debug info stripped down
Branch jump optimizations
Clean cache
Front swap
Memcopy operations optimized for ARM A15
ZCache enabled
Cryptographic operations
Downloads:
BitO-KU
BitO-K12
BitO-KX10
Installation
Install ZIP via custom recovery
Install F2FS injector ZIP if you need proper F2FS support.
Notes
Don't forget flash DTB if necessary
If you need to update blobs, you can easily flash this zip (OTA 4.2), thx to @Steel01
Info about F2FS, and experimental TWRP to support it here.
I would be glad to get some feedback about battery life, performance, etc... All suggestions welcome :good:
Thnx:
@Steel01
@Bogdacutu
@faux123
@twistedumbrella
@berryman13
@Unjustified Dev
@SuperPichu
@corvus
Tegra Devs and every developer and tester behind and supporting this big community.
Big thx to everybody for helping to get a new device
List of donnors for a new Shield Tablet:
@xanthrax : $25
@gasgiver : $10
@primaleph : $25
@marvi0 : $10
@strann0 : $10
@DR_HAX34 : $15
-----------------------------
TOTAL: $95
XDA:DevDB Information
BitO-K, Kernel for the Nvidia Shield Tablet
Contributors
BitOBSessiOn
Source Code: https://github.com/BitOBsessiOn/android_kernel_nvidia_shieldtablet
Kernel Special Features: Latest Nvidia sources, stable, fast, responsive, smooth
Version Information
Status: Stable
Current Stable Version: K10-006
Stable Release Date: 2017-06-25
Current Beta Version: K12
Beta Release Date: 2018-05-28
Created 2015-04-01
Last Updated 2018-05-29
Could be worth mentioning the .IMG file can also be flashed using Flashify without having to connect to computer at all.
pretty and nice
Running almost perfect in CM12
Waiting for OC I know you can do it,I use run the shaky156 OC 2.499 kernel for almost 1 months with no problems and I switched to CM12
Thanks and keep the nice work
kickassdave said:
Could be worth mentioning the .IMG file can also be flashed using Flashify without having to connect to computer at all.
Click to expand...
Click to collapse
Thnx, OP updated.
kickassdave said:
Could be worth mentioning the .IMG file can also be flashed using Flashify without having to connect to computer at all.
Click to expand...
Click to collapse
BitOBSessiOn said:
Thnx, OP updated.
Click to expand...
Click to collapse
And right after flashing CM12 in TWRP
That's what I did anyways.
Anybody can give me feedback about battery on CM 12 / 12.1 when device screen off (deep sleep), please?
Thnx!
BitOBSessiOn said:
Anybody can give me feedback about battery on CM 12 / 12.1 when device screen off (deep sleep), please?
Thnx!
Click to expand...
Click to collapse
The - latest wifi ROM- version you uploaded in the CM12 thread also includes your kernel as presented here?
Is it possible to include colour profiles in the kernel? Love it on my nexus 5! Looking forward to seeing this move forward
Also is there a rest of world lte version in the works? Thanks
silasje1 said:
The - latest wifi ROM- version you uploaded in the CM12 thread also includes your kernel as presented here?
Click to expand...
Click to collapse
Yes, I always compile CM 12.x with my kernel version. The 12.1 is totally experimental.
ishamm said:
Is it possible to include colour profiles in the kernel? Love it on my nexus 5! Looking forward to seeing this move forward
Also is there a rest of world lte version in the works? Thanks
Click to expand...
Click to collapse
Take note for colour profiles but I don't know how complex it can be... I'll be studied, sure.
About LTE RoW (wx_un_do) vs LTE US (wx_na_do) they are totally compatible as @Steel01 and me have seen. I have LTE RoW model and actually use wx_na_do compilation. In the future, perhaps, we will create a specific branch.
BitOBSessiOn said:
Yes, I always compile CM 12.x with my kernel version. The 12.1 is totally experimental.
Click to expand...
Click to collapse
I will be away a few days so a lot of sleep time for the tablet Will report
Here's some cpu state time info for u. 51mhz is deep sleep right?
With CPU Spy you get how long the device is in deep sleep: http://forum.xda-developers.com/showthread.php?t=1011497
Cpu spy capture for u. I've been running it like I stole it all day.
I don't have installed CPU Spy but BBS reports that it sleeps like a baby.
Got a spare apk for bbs by chance?
Download Better Battery Stats XDA edition here http://forum.xda-developers.com/showpost.php?p=15869886&postcount=2
Just wanted to let u know the mic issue was a gapps thing, the minimal edition has problems, went back to pagapps (the final 03/15 one) and if I flash this kernel on steels cm12 it works perfect. No sound fc either. The ONLY issue I found is moving to SD. Still says no room even after the folder mount patch. Battery is great btw, thanks much for the work
Is it possible to add double tap to wake / sleep? ☺
Sent from my SHIELD Tablet
badly and +
drewski_1 said:
Is it possible to add double tap to wake / sleep?
Sent from my SHIELD Tablet
Click to expand...
Click to collapse
SD fix
OC CPU and GPU
Related
Mono Kernel for HTC One M9 (Hima)
Let's start this off with the basic and regular warning and disclaimer :
Code:
#ifdef (IF_YOU_FLASH_THE_KERNEL)
* No one except you chooses to flash this kernel, this is your [B]own[/B] choice
* Do not flash this if you expect stability that equals to a stock kernel
* Neither me or XDA is responsible if the kernel destroys your device
* No cats harmed during the creation of this kernel
#endif
Mono Kernel is a kernel made with simplicity and customizations in mind, I never wanted a kernel with gazillions of "bloaty" features (governors, schedulers, etc) that gives me uneasiness since there's too many choices to be made.
Technical details :
If you want to know about the toolchain and stuff I used
- Compiled with Google GCC 4.9 (pre 21-07-2016 releases), and UberTC 4.9.4 (21-07-2016 release and newer)
- Built on a SlimROM source tree
- Little to no weird optimizations flags, I'll avoid adding -Ofast, -O3, Graphite or anything related to them
Features :
Some bits of features that you'll see
- Latest upstream kernel, currently on 3.10.102
- zzmoove (bLE edition) and elementalx governor
- FIOPS and SIOPLUS scheduler
- Configurable thermal control
- Toggleable CRC and Dynamic Fsync
- USB Fastcharge
- UKSM 0.1.2.3 (Ultra KSM, an improved KSM)
- KCAL v2 (post-processing control for display)
- state_notifier driver, replaces earlysuspend and powersuspend
- Franco's Sound Control
- zRAM support
- Mini-bits of somewhat-safe (but not necessarily stable) optimizations
- Lots of updates and upstream works from various sources (CAF, Google, and Linux)
- And probably more
Bugs :
- Possible bug: Stereo channels are reversed (left to right and right to left) (False report on my side)
- None, at least for now
Download :
Get it while fresh!
AndroidFileHost Folder
Installation :
Please read all of this before continuing
For .img format (Slim6 only) :
IMG is deprecated as of 12 July release, please use ZIP instead
- Download the .img and put it somewhere
- Reboot to recovery (I'll assume you're using TWRP here)
- Press 'Install' then press 'Install Image' (located on the bottom-right side)
- Locate the .img
- Make sure you select 'Boot', not 'System Image' or 'Recovery'
- Swipe and install, but don't reboot
- Reinstall any Systemless mods (Systemless Root, Xposed, etc) if you have one
- Reboot and wait for it to boot!
For .zip format :
- I mean... you probably know how
- Just flash the zip
Compatibility List :
Check if your ROM is compatible
- Tested on Slim6
- Working on CM
- Possibly working on RR
Credits :
All these talented people deserves a cookie
(In no order)
- flar2
- faux123
- franciscofranco
- anarkia1976
- chadouming
- neobuddy89
- imoseyon
- myfluxi
- yarpiin
- Grarak
- ##W4TCH0UT##
- benschhold
- Evolutionzz & Dims_Camper (some nice friends to talk)
There's too many people that deserves to be here, if you're one of them (in case I somehow forgot to credit you here and on the source code / Git repo page), please, don't hesitate to PM me!
Notes :
- Mono Kernel will always remain on 'testing' phase, mostly because I tend to screw up and break stuff, so I don't warrant any stable release, unless otherwise mentioned
- This kernel is working on CM (and possibly other ROM based on it)
- Nope, I have never tested this on any other variant of the M9 apart from the International variant
- Yes, no hotplug support for now, I'm still experimenting with hotplugs on this device
XDA:DevDB Information
Mono Kernel, Kernel for the HTC One (M9)
Contributors
F4uzan
Source Code: https://github.com/F4uzan/mono_hima
Kernel Special Features: Uh... it's downloadable ?
Version Information
Status: Testing
Created 2016-07-09
Last Updated 2016-07-31
FAQ (Frequently Asked Questions)
Q : I want "x" and "y" feature to be added in this kernel
A : Sure thing, I'll give no promises it'll be added, but if I find it interesting (and usable), why not?
Q : Hey, can you fix "x" issue ? (if you provides no log or details whatsoever)
A : Please, give me more details, how can I reproduce the issue on my side ? If I'm unable to reproduce the issue then can you please provide more details to the issue ?
Q : What logs are needed to give you an exact information of my issue ?
A : /sys/fs/pstore/console-ramoops, dmesg, and any kind of kernel logs (not logcat) you can find
Q : Will this work on "x" ROM based on AOSP / CM ?
A : Probably, it might or might not work, test it out by yourself
Q : Will this work on stock or any Sense based ROM ?
A : Nope and probably never will, but I'll reconsider that if there's enough request
Reserved #1
More reserved (just in case)
One question-do you have the FM module and IR module in the kernel enabled? If you do, I;m willing to test on CM-I've been waiting for that.
wyvernwaddell said:
One question-do you have the FM module and IR module in the kernel enabled? If you do, I;m willing to test on CM-I've been waiting for that.
Click to expand...
Click to collapse
FM and IR module ? I'm pretty sure I didn't use both, so, the answer is probably no, let me double check just to be sure
EDIT : IR works fine using "SURE" Universal Remote app, I'll check if FM works
EDIT2 : Double checked whether IR works or not, it works with both my TV and air conditioning unit, so it's definitely working
EDIT3 : I don't think FM is working, I've tested with the CM FM Radio app, and it can't open /dev/radio0 (the device for FM radio), I'll see if I can find a way to fix it
AWESOME!
I'll be testing this ASAP! Thanks for this kernel!!! I assume it's MM Compatible? I'm using cm13 and will post any results I have after testing it out for a bit. So glad for this :good:
F4uzan said:
FM and IR module ? I'm pretty sure I didn't use both, so, the answer is probably no, let me double check just to be sure
EDIT : IR works fine using "SURE" Universal Remote app, I'll check if FM works
EDIT2 : Double checked whether IR works or not, it works with both my TV and air conditioning unit, so it's definitely working
EDIT3 : I don't think FM is working, I've tested with the CM FM Radio app, and it can't open /dev/radio0 (the device for FM radio), I'll see if I can find a way to fix it
Click to expand...
Click to collapse
YOU ARE THE MAN! Thank you!!
Sent from my NVIDIA SHIELD Tablet using XDA Labs
Can't wait to try this out. Thanks for your dedication
Skickat från min HTC One M9 via Tapatalk
Roobwz said:
Can't wait to try this out. Thanks for your dedication
Skickat från min HTC One M9 via Tapatalk
Click to expand...
Click to collapse
Be sure to send me some feedback, thanks for trying out
wyvernwaddell said:
YOU ARE THE MAN! Thank you!!
Sent from my NVIDIA SHIELD Tablet using XDA Labs
Click to expand...
Click to collapse
Thanks !
Krsmqn said:
I'll be testing this ASAP! Thanks for this kernel!!! I assume it's MM Compatible? I'm using cm13 and will post any results I have after testing it out for a bit. So glad for this :good:
Click to expand...
Click to collapse
Yes, it's actually only compatible with MM (unless the changes from L to M isn't that huge, I might be able to bridge a compatibility between both).
Have you experienced better battery with the kernel compared to stock? I remember when I was using the cm kernel and got really bad SOT thanks to the frequencies jumping all around all the time..
Skickat från min HTC One M9 via Tapatalk
Did NOT work on
[ROM] [ M9 ][himaul]Resurrection Remix M v5.7.0- MM 6.0.1_r46
Bootloop!
Roobwz said:
Have you experienced better battery with the kernel compared to stock? I remember when I was using the cm kernel and got really bad SOT thanks to the frequencies jumping all around all the time..
Skickat från min HTC One M9 via Tapatalk
Click to expand...
Click to collapse
Hmmh, I can say the battery usage is pretty on par with stock (I get an average of 4.5 hours of SoT, on stock it's roughly 5 hours)
AlphaAnimal said:
Did NOT work on
[ROM] [ M9 ][himaul]Resurrection Remix M v5.7.0- MM 6.0.1_r46
Bootloop!
Click to expand...
Click to collapse
Thanks for the report, I have been working on the AnyKernel version that should fix this, for now, everyone should avoid using this in any CM based ROM since the result might be the same
F4uzan said:
Hmmh, I can say the battery usage is pretty on par with stock (I get an average of 4.5 hours of SoT, on stock it's roughly 5 hours)
Click to expand...
Click to collapse
Well i gotta try it myself then. I'm running ice ATM and getting around 6-6:30 SOT no problem. May be cheating cause of airplane mode.. ?
Skickat från min HTC One M9 via Tapatalk
Let's all be patient now and let the dev do his magic.
Eagerly, but patiently awaiting.
Thanks for all the reports on CM13 !
I can't test it out on CM myself because I really need the phone to be on a somewhat stable condition, but I'll be fixing it soon !
Hello everyone !
A new update is up now, it should fix CM compatibilities. It's also in AnyKernel zip format (no more tedious .img flashing).
For complete changes, you can check the source link (I'm not going to write all of them here), but it's mostly just changes I merged from CodeAurora / CAF and Google, there's also some more optimizations in code.
The download link is here or in the link in OP
Happy testing !
https://www.androidfilehost.com/?fid=24591023225178092
F4uzan said:
Hello everyone !
A new update is up now, it should fix CM compatibilities. Its also in AnyKernel zip format (no more tedious .img flashing).
For complete changes, you can check the source link (Im not going to write all of them here), but its mostly just changes I merged from CodeAurora / CAF and Google, theres also some more optimizations in code.
The download link is here or in the link in OP
Happy testing !
Click to expand...
Click to collapse
Boots just fine. Gonna use it a bit and evaluate. Any recommendations for kernel control?
Krsmqn said:
Boots just fine. Gonna use it a bit and evaluate. Any recommendations for kernel control?
Click to expand...
Click to collapse
Until I add Synapse support, I recommend this modded Kernel Adiutor, the regular Kernel Adiutor works fine but it doesn't have all the control necessary for the kernel
Glad to see some movement on dev-kernel section!! I have been using Smoocha kernel for a while and return to stop again since the support is abandoned.. I could help and test this kernel on CM13 (since is now compatible), I am a cherry-picked addicted.
It could be great seeing working with Uber 5.x-6 toolchain, this is the only thing that I really envy of Nexus 6p.
Many thanks for your support and contribution :good:
Hi Huawei P9 people!
This is my modified kernel with some kernel optimizations and some compiler optimizations.
The goal of abyss-caf is to compromise stability and improved performance.
I will not be overhauling this project with changes that are not logical to add.
This kernel should work on all stock based roms; there is a separate version for NCS rom.
How does one achieve this?
- build kernel with an optimized toolchain
- use compiler optimization flags (experimental)
- remove redundant code
- improve existing code with more efficient code
- reduce/increase speed of timers (depends on what type of function)
- etc. (most are not easy to explain)
This kernel is built with Linaro GCC 4.9.4 that is optimized for ARM64 devices.
Is there actually a performance improvement?
With all the changes added up, there should be. Whether or not one notices the difference is another thing.
Personally, I do feel the performance difference. It is easier to notice the difference with lower level specs.
For those interested in how the kernel optimizations will benefit/work, please look at my github source and read the commit messages.
For those interested in how the compiler optimizations/hacks will benefit/work, please look at this article.
Downloads:
BasketBuild
AFH
Source:
GitHub
I do not mind if there's some non-development/off-topic discussion here, just no discussion about other works that is nowhere near related to mine.
Also, please refrain from comparing works here; it really kills the spirit of development. Go do that in some other thread.
XDA:DevDB Information
abyss kernel for stock and stock based roms, Kernel for the Huawei P9
Contributors
kwoktopus, paulobrien, arter97, flar2, Christopher83, Cl3Kener, frap129
Source Code: https://github.com/kwoktopus/abyss_kernel_eva
Kernel Special Features: MAJOR KEY
Version Information
Status: Testing
Created 2016-08-24
Last Updated 2016-10-08
Main Patches and Features:
- Abyss Optimizations (compiler)
- optimized square root algorithm (3x faster)
- added BFQ io scheduler (now default)
- backported random from Linux 4.2+ (better entropy, better performance)
- utilize power efficient workqueues all over the kernel
- port quickwakeup driver for hisi from moto
- optimized lib patches
- optimized arm64 lib patches
- disabled gentle_fair_sleepers for better UX
- enhanced multicore decision making
How to install:
Flash the proper kernel zip in TWRP.
New to phone development?
If you are new to these forums or development in general,
please consult other members before trying this out.
There is no shame in asking for help politely and respectfully,
as long as you don't quote the whole OP or think slower than a sloth.
Frequently Asked Questions:
Is this a custom kernel?
I was asked this question once, and it posed as a real good question. I do not consider abyss to be a "custom kernel" per se, but more so as a modified kernel. The patches and features that go into this kernel do not make it customizable. What they do is improve what has already been implemented. It is like swapping a car's engine for a better one rather than just adding LED flooring lights and fancy car mats.
Can you add [this] and [that] feature to abyss?
Something I pride myself with this kernel is that it does not have a bunch of random, useless features or patches mashed into it. Everything put into this kernel is thought out well and tested. I see a lot of works being made popular because it has [this] and [that] feature when really, it's nothing revolutionary. As a matter of fact, most things added to any kernel will not make it 5x better than any other kernel. Most of the time, simple is better; and in this case it definitely is!
Awesome, will stay tune about new releases, will try the kernel later.
Just for clarify, kernel works in any P9 or just for L09 or L19?
jeremymolina said:
Awesome, will stay tune about new releases, will try the kernel later.
Just for clarify, kernel works in any P9 or just for L09 or L19?
Click to expand...
Click to collapse
There's no reason that it wouldn't work, but there's always that slight chance. Pretty sure you'll be fine
Finally! May God bless you!
---------- Post added at 08:13 AM ---------- Previous post was at 08:07 AM ----------
I have a question though.
Will it conflict with the L Speed app I'm currently using?
And to finish off my day (the start of many of yours), here is my 2nd release for y'all.
Code:
- optimized square root algorithm (3x faster)
- added BFQ io scheduler (now default)
- backported random from Linux 4.2+ (better entropy, better performance)
- utilize power efficient workqueues all over the kernel
- port quickwakeup driver for hisi from moto
- optimized lib patches
- optimized arm64 lib patches
- disabled gentle_fair_sleepers for better UX
- enhanced multicore decision making
abyss-caf-eva-nightly-20160824.zip
darthkir said:
Finally! May God bless you!
Click to expand...
Click to collapse
God has blessed me alright :victory:
darthkir said:
Will it conflict with the L Speed app I'm currently using?
Click to expand...
Click to collapse
Not sure why it would, what tweaks do you have turned on? It should be good to go, I highly doubt anything can go wrong with any sort of non-kernel related tweaks.
this is great news! You have my thanks
For anyone on NCS rom, the kernel will not boot for you. Please test this build out. I will be looking into using an AnyKernel 2.0 flash method for TWRP users so that we don't run into conflicts like these in the future.
abyss-caf-eva-ncs-20160824.zip
Not only my rom, its for all recommended if root is installed.
This is ****ing awesome kwoktopus, so excited to try your work (tomorrow). Finally some more new development for the great P9.
Thanks kwoktopus !
Can i flash your kernel on fRomFuture ROM ?
Salamender said:
Thanks kwoktopus !
Can i flash your kernel on fRomFuture ROM ?
Click to expand...
Click to collapse
Not exactly sure. If fRomFuture has ramdisk modifications then probably not, I'll have to make a separate version for it. If you would like to try, download both versions of the kernel and try.
kwoktopus said:
Not exactly sure. If fRomFuture has ramdisk modifications then probably not, I'll have to make a separate version for it. If you would like to try, download both versions of the kernel and try.
Click to expand...
Click to collapse
Neither working on fRomFuture, tried with TWRP flash image method, when i get home ill try with fastboot also.
edint3000 said:
Neither working on fRomFuture, tried with TWRP flash image method, when i get home ill try with fastboot also.
Click to expand...
Click to collapse
If it doesn't work even through fastboot, try flashing my test versions.I will upload it with changes for fRomFuture that may work. Stay posted
edit: i am running low on bandwidth from all the source downloading lately, can someone upload the boot.img from the latest fRomFuture build
Uh...probably super obvious, but do you need unlocked BL and/or root in order to flash the kernel? Ta.
kwoktopus said:
If it doesn't work even through fastboot, try flashing my test versions.I will upload it with changes for fRomFuture that may work. Stay posted
edit: i am running low on bandwidth from all the source downloading lately, can someone upload the boot.img from the latest fRomFuture build
Click to expand...
Click to collapse
Here it is
edint3000 said:
Here it is
Click to expand...
Click to collapse
Try flashing the kernel attached, see if it works
Hi.
I've tried the kernel clean on the NCS ROM 1.2.
Unfortunately, the camera failed to launch and I noticed jerkiness in response.
NxKernel
r4
Yeah, jet another kernel for the falcon!
Why? You might ask and you are right.
I have been experimenting with kernel features, fixes and (alleged) improvements and always tried to create a kernel which I would be happy to use every day on my device. You know the usual stuff: long lasting battery with lag-free performance... It's not easy at all I have to tell. I am not a developer but know my way around Git and programming and researched a lot of sources on the internet looking for kernel stuff. Some patches offer improvements in speed and response time etc, but in reality, many of them do more harm than good when it comes to real-life praxis. In the end, I had a great collection of fixes and patches which I tried (nearly) one-by-one examining the gains and losses of 'em.
All the credits go to the developers of the features - and a little of it to me for putting them together and bringing them to the Moto G.
Features
Compiled with UBERTC 4.9.4 and O2 optimization level
Overclocked [email protected], [email protected], [email protected]
Intelliplug 4.0 CPU hotplug
Intelliactive and Intellidemand CPU governor
PowerSuspend 1.5
Intellithermal v2
Simple GPU Algorithm
Adreno Idler
Power Efficient Workqueues
Fast Charge v2
Dynamic fsync
Enabled NEON mode
Westwood TCP congestion control
Frandom fast random number generator
Wakelock toggles
Click to expand...
Click to collapse
Installation
Download the kernel to your device from the link below
Reboot to recovery
Flash the kernel
(optional) Wipe cache & dalvik cache (recommended)
Reboot
(optional for CM13 - bootloop on CM14) If you would like to enable frandom, copy the 20frandom script (by Ryuinferno, see attached) to system/etc/init.d and change its permissions to 0755.
Click to expand...
Click to collapse
Download
CM14.1/Lineage OS: r4 - https://www.androidfilehost.com/?fid=673368273298920933
CM13: r2 - v1.1 - https://www.androidfilehost.com/?fid=385035244224396903
Please do not mirror any of my files!
I switched to "r" naming scheme which means r1 (v1.0) and r2 (v1.1) are for CM13 and releases from r3 upwards for CM14.1 and Lineage OS.
Click to expand...
Click to collapse
Sources
https://github.com/NStep/android_kernel_motorola_msm8226/tree/cm-14.0-nx
Click to expand...
Click to collapse
Recommended settings in 2nd post.
Changelog in 3rd post.
Many thanks go to:
The CM Team
faux123
arter97
Hurtsky, Kaminari, pinkflozd, alinp, BryanByteZ
soniCron
...and the community for keeping alive a 3-year-old device :highfive:
Click to expand...
Click to collapse
If you would like to help or thank me, you might buy me a beer/coffe/coke to fuel the development.
XDA:DevDB Information
NxKernel, Kernel for the Moto G
Contributors
NxStep
Source Code: https://github.com/NStep/android_kernel_motorola_msm8226/tree/cm-14.0-nx
Kernel Special Features:
Version Information
Status: Stable
Current Stable Version: r4
Stable Release Date: 2017-01-03
Created 2016-10-21
Last Updated 2017-01-03
Recommended settings
I suggest Kernel Adiutor to edit the kernel settings. See attached screenshots for the details. The settings that cannot be seen on the pictures are untouched.
I've attached the two json files to import for the two custom controls in Kernel Adiutor, bluedroid_wakelock and USB_fast_charge. To be able to import directly just change the extensions to json.
*For CM13 only! Causes bootloop on CM14 for now.*
Also attached the frandom enabler script (20frandom) that is to be placed in system/etc/init.d wit the permission 0755. Make sure you remove the txt extension first!
Sorry for the extension messing, xda does not allow to upload json files or files without extension... I might move the files to my file host soon.
CPU governor tunables
*to be updated for CM14*
Optimized governor tunables based on soniCron's superb guide. It works with interactive and intelliactive as well and scales fine with overclocking enabled and disabled too.
Basically, it uses 4 optimal frequencies: 300MHz, 998MHz, 1190MHz and 1593MHz if OC enabled. It prevents the CPU jumping a lot between frequencies that do not provide enough performance for a given task. I managed to get 4-5 hours of screen on time with these settings.
Tunables are as following:
Code:
above_hispeed_delay: 20000 998400:60000
boost: 0
boostpulse_duration: 80000
go_hispeed_load: 75
hispeed_freq: 998400
io_is_busy: 1
min_sample_time: 40000
sampling_down_factor: 0
sync_freq: 0
target_loads: 98 384000:56 600000:31 787200:27 998400:82 1094400:9 1190400:95 1305600:3 1344000:4 1401600:7 1497600:6 1593600:85
timer_rate: 25000
timer_slack: 80000
two_phase_freq: 998400,998400,998400,998400
up_threshold_any_cpu_freq: 998400
up_threshold_any_cpu_load: 95
Changelog
r4 - 03.01.2017
merged latest CM14.1 kernel sources
update to latest prebuilt toolchain UBERTC 4.9 by mdalexca
added some additional patches, see Github
r3 - 25.11.2016
intial release for CM14.1
merged latest CM14.1 kernel sources
switched to "r" naming scheme
r2 - v1.1 - 11.11.2016
merged latest CM13 sources
r1 - v1.0 - 21.10.2016
initial release
Reserved another just in case.
NxStep said:
NxKernel
v1.0
Created 2016-10-21
Last Updated 2016-10-21
Click to expand...
Click to collapse
Downloaded and installed a couple of hours ago.
Feels smooth and snappy. Have not encountered any glitches.
I'm running [7.0.0_r14]AOSP+OM
Thank you for bringing another kernel to this old device.
this kernel have multirom support?
thanks for your amazing work
Pretty nice idea man, I'll test it. Thanks for this kernel
Thank your for your feedback!
aldanopolis said:
this kernel have multirom support?
thanks for your amazing work
Click to expand...
Click to collapse
No, it doesn't. I haven't really examined this feature as I use only one ROM on my phone. But I might add it in the future if it is requested.
NxStep said:
Thank your for your feedback!
No, it doesn't. I haven't really examined this feature as I use only one ROM on my phone. But I might add it in the future if it is requested.
Click to expand...
Click to collapse
IMHO, As we have no kexec workaround in last version of multirom , this is not mandatory.
Any way to backup the stock kernel of Orion Os in case I find any issue with this kernel?
Guillosd said:
Any way to backup the stock kernel of Orion Os in case I find any issue with this kernel?
Click to expand...
Click to collapse
Use Flashify
It has the option to backup the current kernel and can also flash imgs, zips and stuff.
Good to see another kernel available for our old (but seemingly immortal?) phone. Best of luck to you!
Like Kamin4ri said thanks for the kernel i really hope that moto g be immortal best phone that i used for sure, good enough for what i need.
Would be great if it has dt2w...
Aayushya said:
Use Flashify
It has the option to backup the current kernel and can also flash imgs, zips and stuff.
Click to expand...
Click to collapse
nandroid restore would work as well ,right?
Hiraethic said:
nandroid restore would work as well ,right?
Click to expand...
Click to collapse
Yes
everything works awesome on aosp 7.0 by srisuriya
Skarni said:
Downloaded and installed a couple of hours ago.
Feels smooth and snappy. Have not encountered any glitches.
I'm running [7.0.0_r14]AOSP+OM
Thank you for bringing another kernel to this old device.
Click to expand...
Click to collapse
Did you change any settings in Kernel Auditor?
---------- Post added at 10:48 AM ---------- Previous post was at 10:46 AM ----------
NxStep said:
Recommended settings
~snip
[/CODE]
Click to expand...
Click to collapse
Those pictures on second post are recommended settings?
kamesh_kraken said:
Did you change any settings in Kernel Auditor?
---------- Post added at 10:48 AM ---------- Previous post was at 10:46 AM ----------
Those pictures on second post are recommended settings?
Click to expand...
Click to collapse
I did apply some of the settings from the pictures. I chose different scheduler and network TCP algorithm.
I do not have the paid version of Kernel Adiuitor, so I was not able to use the .json files.
Skarni said:
I did apply some of the settings from the pictures. I chose different scheduler and network TCP algorithm.
I do not have the paid version of Kernel Adiuitor, so I was not able to use the .json files.
Click to expand...
Click to collapse
Use a mod, kernel adiutor is open source
Hi guys,
I know that this forum is not widely used by ZTE Axon 7 Mini owners, but I still want to share my work the kernel used by the stock firmware.
Most of the parts were of course already based on the work of others, so I will give credits at the end of this thread of course.
Pre-requisites:
Unlocked bootloader
TWRP flashed
Knowledge you do this all at your own risk! I tested this kernel with my EU model, so I don't know if this will work on the US models, too.
Features:
- Based on latest kernel source shared by ZTE (ZTE B2017G Nougat(7.1.1) Kernel(3.10.84))
- Built with GCC 4.9 toolchain
- UC to 499MHz for BIG and 403 MHz for LITTLE (thanks to @flar2)
- OC to 1651 for BIG (again @flar2)
- Additional governors: yankactive, blu-active, impulse
- Additional IO schedulers: Sioplus, Zen, FIOPS. Tweaked Row is set as default
- Additional TCP congestion algorithms with westwood being the default one
- Approx. 30% faster due to CRC calculation and auditing disabling
- Sweep2Sleep on the navigation bar
- frandom RNG
- Sound Control by @flar2
- ZRAM using LZ4 optimized for ARM by default
- Optimized power management driver by @Yank555
- Native exFAT support without needing fuse @dorimanx)
- KCAL
- Vibration control
- uses higher power CPUs to boot (got roughly 3s faster boot time)
- Dynamic Fsync
- Gentle Fair sleepers can be toggled via sysfs and Kernel Adiutor
- Smaller tweaks
To do:
- Switch toolchain
- Remove "dirty" from the kernel name Apparently I need to push all changes to github before compiling(or recompiling the same kernel as soon as I pushed everything)
- Set the phone to accept the lower frequencies without having to set this up in Kernel adiutor
- Alter interactive governor to use full frequency range
- Add D2TS for screen and fingerprint sensor, S2W
- Wakelock reductions
- Maybe BLX, KCAL (even though I don't get the point to implement it) I was curious and did it now, looks nice
- LED and vibration control
- Switch hotplugging mechanism to Lazyplug, hotplugging is not that energy efficient anymore
See the attached picture regarding the CPU stats when using yankactive for example
Credits go to:
@Lord Boeffla @flar2 @dorimanx @Yank555
Unfortunately I didn't give proper credits on my github, I want everyone to know, that none of the features were designed and written by myself, just adapted to work on our phones!
Download here:
https://drive.google.com/drive/folders/0B0mn6OUqIDzBZG1DM1Y4dmxUV2c
Flash in TWRP, root and every other ramdisk modification will be preserved (Anykernel2 by osmosis)
Github:
https://github.com/TheSSJ/tulip_kernel
Changelog
V1.1: Initial version for public release!
V1.2: KCAL support
V1.3: Changed boot CPUs to higher power ones, added dynamic Fsync, added Quick Wakeup driver
V1.4: Gentle Fair Sleepers can be toggled now, ROW scheduler tweaked
NOTE: in case anyone is wondering why I didn't pick the DevDB projects: as our device is not activated to be used with DevDB, I went with normal threads
TheSSJ said:
V1.1: Initial version for public release!
NOTE: in case anyone is wondering why I didn't pick the DevDB projects: as our device is not activated to be used with DevDB, I went with normal threads
Click to expand...
Click to collapse
Hi! Amazing work! Thx for the job.
Can I use this kernel with AOKP? AOKP has android 7.1.2
Askael said:
Hi! Amazing work! Thx for the job.
Can I use this kernel with AOKP? AOKP has android 7.1.2
Click to expand...
Click to collapse
I wouldn't exclude this, but as I am running on stock, I can't confirm or deny...
You could make a backup of your boot and flash it and see what happens, worst thing is that you need to reboot to recovery and restore your backup
TheSSJ said:
V1.1: Initial version for public release!
NOTE: in case anyone is wondering why I didn't pick the DevDB projects: as our device is not activated to be used with DevDB, I went with normal threads
Click to expand...
Click to collapse
TheSSJ said:
I wouldn't exclude this, but as I am running on stock, I can't confirm or deny...
You could make a backup of your boot and flash it and see what happens, worst thing is that you need to reboot to recovery and restore your backup
Click to expand...
Click to collapse
Thank you for replay, what governor you use?
You will need to try and see.
It uses anykernel which is good. But aokp and lineage are on android 7.1.2 while stock is on android 7.1.1. There was at least one kernel api change that may cause problems. But I'm not sure.
I'm assuming this package has the wlan module also...?
Askael said:
Hi! Amazing work! Thx for the job.
Can I use this kernel with AOKP? AOKP has android 7.1.2
Click to expand...
Click to collapse
@ssj @tdm
Guys, try flash kernel, AOKP, don't work.
W8 kernel version from customs
tdm said:
I'm assuming this package has the wlan module also...?
Click to expand...
Click to collapse
You mean the prima wifi stuff I have seen in you github? Honestly I didn't feel the need...does it improve the wifi experience or is it just for making it compatible with LineageOS?
No, I mean the kernel module for wifi, /system/lib/modules/pronto/pronto_wlan.ko. If that doesn't match your kernel, it won't load and you won't have wifi.
Note stock has a handful of other kernel modules, but I don't think any of them are needed Most look like they are for testing.
TheSSJ said:
You mean the prima wifi stuff I have seen in you github? Honestly I didn't feel the need...does it improve the wifi experience or is it just for making it compatible with LineageOS?
Click to expand...
Click to collapse
tdm said:
No, I mean the kernel module for wifi, /system/lib/modules/pronto/pronto_wlan.ko. If that doesn't match your kernel, it won't load and you won't have wifi.
Note stock has a handful of other kernel modules, but I don't think any of them are needed Most look like they are for testing.
Click to expand...
Click to collapse
Oh, ok...pronto driver is built into the kernel though, all other modules are really for debugging and testing as far as I could gather, so they are not included (and the phone works fine)
@Askael: As for a custom kernel for Lineage/AOKP etc: as I won't have these OS's on my phone I use as my daily driver, I can of course create one, but it is always published as untested, so there is no point IMHO.
TheSSJ said:
Oh, ok...pronto driver is built into the kernel though, all other modules are really for debugging and testing as far as I could gather, so they are not included (and the phone works fine)
@Askael: As for a custom kernel for Lineage/AOKP etc: as I won't have these OS's on my phone I use as my daily driver, I can of course create one, but it is always published as untested, so there is no point IMHO.
Click to expand...
Click to collapse
But we can test this. But if you not want - don't worry! :good:
Askael said:
But we can test this. But if you not want - don't worry! :good:
Click to expand...
Click to collapse
Will think about it
Version 1.2 is out, now with KCAL screen control support!
I'm building a kernel with many of these features for the LineageOS ROM. Want me to make a thread, and then you can link it for people interested in using it in your OP? Source is here: https://github.com/djkazic/sombrax_kernel
kevincai96 said:
I'm building a kernel with many of these features for the LineageOS ROM. Want me to make a thread, and then you can link it for people interested in using it in your OP? Source is here: https://github.com/djkazic/sombrax_kernel
Click to expand...
Click to collapse
Hi,
Feel free to open a new thread it is important to push this phone amd its potential as good as possible!
Development will go on, i still have some items to implement :good:
@TheSSJ
Hi! Any news about update?
@TheSSJ
Good to see you in Axon mini from zenfone 2
Askael said:
@TheSSJ
Hi! Any news about update?
Click to expand...
Click to collapse
You mean a custom kernel for CM builds or an update for this stock kernel?
For the CM based one I didn't start, although applying the modifications I applied to my kernel should be working
Druboo666 said:
@TheSSJ
Good to see you in Axon mini from zenfone 2
Click to expand...
Click to collapse
I was spotted It's a great phone, let's get the most out of it
TheSSJ said:
You mean a custom kernel for CM builds or an update for this stock kernel?
For the CM based one I didn't start, although applying the modifications I applied to my kernel should be working
I was spotted It's a great phone, let's get the most out of it
Click to expand...
Click to collapse
For this stok kernel
I was spotted It's a great phone, let's get the most out of it
Click to expand...
Click to collapse
i am using Axon 7 and yeah its a great phone i must miss you in axon 7
Updated version uploaded and available on G-Drive, boot time increased by 3s (you take what you can get )
/EDIT: Next version out, small enhancements and adding the possibility to enable/disable gentle fair sleepers
Introduction
HateKernel is a custom kernel compatible with libra/aqua and on LineageOS 15.1-based ROM (Oreo 8.1.0). This kernel source are forked from Cozzmy13's source (CAF) and are made to improve performance, battery life, features and stability of our device. Obviously, I can't guarantee all of those claims at once due to the fact that there is a trade-off among them, so its up to you for applying tweak or setting-up your device based on your usage criteria.
Click to expand...
Click to collapse
Image
Damn! I'm too lazy to post any. :silly:
Click to expand...
Click to collapse
Features
-Boeffla wakelock blocker.
-FAUX sound control.
-KCAL advanced color control.
-CPU boost & input-boost. (off by default)
-Kernel samepage merging. (off by default)
-Power-efficient workqueue. (on by default)
-Disable storage CRC check. (reduce IO overhead)
-FSync on/off. (on by default)
-250Hz tick timer-interrupt & dyntick tickless-idle. (may help with battery and UI lagginess? I'm not sure.)
-Added CPU Governor - relaxed, blu-active, despair, zzmoove, elementalx, wheatley, impulse, bioshock.
-Added IO-Scheduler - fiops, sio, sioplus, zen, vr, maple.
-Exposed all TCP congestion algorithm.
-Proper undervolt. (untweakable. Hardcoded in kernel. Blame QCom)
-Compiled with UBERTC-8.x.x -O2 flag.
-A few more optimization.
Click to expand...
Click to collapse
Installation instruction
Required - TWRP recovery latest version & Nougat-bootloader.
NOTE: For AnyKernel2 flashable zip, I highly recommend to flash your stock ROM's boot.img first.
Flash via 'fastboot':
1) Download 'HateKernel-x.x.img'
2) Put the image in same folder as fastboot executable.
3) Run thru command "fastboot flash boot HateKernel-x.x.img"
Flash via TWRP recovery (boot.img):
1) Select install and change mode to "Flash Image" in TWRP.
2) Flash 'HateKernel-x.x.img' in 'boot' partition.
3) Obviously, reboot.
Flash via TWRP recovery (AnyKernel zip) RECOMMENDED
1) I think you should know how at this point.
2) Install as usual.
Click to expand...
Click to collapse
Downloads
All version >
Dropbox: Download
Click to expand...
Click to collapse
Credits
*Cozzmy13 for kernel source
*AndropaX
*flar2
*faux123
*savoca
*Boeffla
*jollaman999
*nathanchance
*tester/suggester/advisor and everyone who helped to improve HateKernel
*everyone i forgot to add
Click to expand...
Click to collapse
XDA:DevDB Information
HateKernel, Kernel for the Xiaomi Mi 4C
Contributors
kopter36
Source Code: [url]https://github.com/iZwnMswn/kernel_xiaomi_msm8992[/URL]
Kernel Special Features: Read "Features".
Version Information
Status: WIP
Current Stable Version: HateKernel-3.1
Stable Release Date: 2018-05-28
Current Beta Version:
Beta Release Date:
Created 2018-02-14
Last Updated 2019-03-08
+ Preliminary info.
- Kernel in .img format are only compatible with Lineage-15.1 by Cozzmy13 ONLY. Don't flash it on other ROM even from the same source.
- HateKernel-1.5_r2 and up currently had issue with some device won't be able to boot. I'm currently still working on it.
+ Download info.
- Testbuild : There is 2 version (Lineage-15.1 stock & HateKernel build). Please test both version from lower-number to highest and report back which one is working + state last Stable-release of HateKernel that is working before.
- Experimental release is essentially a beta version but have been tested by me, but sometimes it might not working reliably with certain ROM+variant(libra/aqua).
- Stable release, as the name imply, mostly always working and have no major bug. This version have been tested extensively to avoid complaint from users and headache for me
Thank you so much for every feedback.
+ Changelog {ascending order}
HateKernel-1.1
- initial build using Google's toolchain. (GCC-4.9)
HateKernel-1.2
- support libra and aqua variants.
- expose all standard CPU governors + add elementalx.
- expose all standard IO-schedulers.
- expose all standard TCP congestion algorithms.
- input-boost and CPU-boost.
- enable RCU boost.
- Kernel Samepage Merging.
- implement display_state API.
- msm8992 initial overclocking.
- Slimbus overclock.
- enable Error Detection and Correcting log capability.
- enable CTS and SHA512 crypto for ARMv8.
- use asymmetric-key-type for crypto.
- compiled with UberTC-4.9.X (GCC-4.9.4)
HateKernel-1.3
- add CPU governors > (bioshock, blu_active, despair, impulse, relaxed, wheatley, zzmoove)
- add IO-schedulers > (fiops, maple, sio, sioplus, vr, zen)
- add WireGuard support.
- revert msm8992 initial overclocking.
- undervolt CPU with stable value.
- fix display_state implementation.
- compiled with UberTC-5.3.X (GCC-5.3.1)
HateKernel-1.4
- add KCAL advance color controls.
- add FAUX sound controls.
- add Boeffla wakelock blocker.
- 1000Hz ticks + dynamic tickless-idle.
- disable storage CRC check.
- FSync on/off.
- remove Edge-Touch for touchscreen.
- enable ARM's v8 hw CRC32.
- enable parallel crypto engine.
- compiled with -O3 flags.
HateKernel-1.5_r2 {stable} {alternative}
- based on HateKernel-1.1 config with stable features.
- fixed Synaptic's touchscreen issue.
- revert some minor features and optimization in favor of stability.
- compiled with -O2 flags again.
HateKernel-1.6b {staging}
- based on Hatekernel-1.4 config with fixed Synaptic's navigation button issue.
- 100Hz timer interrupt tick.
- enable MSM kgsl triple buffer.
- improve scheduler for SMT operation.
- a lot of underlying optimization.
- optimize very likely/unlikely branch (yes, I'm aware of security-hole for this one)
- fully compiled with -O3 flags (don't worry about cache miss, trust me)
ps : This list is depreciated. I will clean this as soon dev-build are complete
Whoa, can't wait for this to be released and given a bunch of customization soon
flammenwerferx said:
Whoa, can't wait for this to be released and given a bunch of customization soon
Click to expand...
Click to collapse
DL link posted. Try it out
long time not see a custom kernel, cool
so if you use kernel based on Los 15.1, can I use this for other roms based los15.1 kernel?
nicee, will this compatible with others 15.1 based?
hanuraiga said:
long time not see a custom kernel, cool
so if you use kernel based on Los 15.1, can I use this for other roms based los15.1 kernel?
Click to expand...
Click to collapse
IcyGlacial said:
nicee, will this compatible with others 15.1 based?
Click to expand...
Click to collapse
It should work. I've no idea if my kernel will broke something on other LoS-15.1 based rom as I've only tested it on unofficial LoS15.1 by Cozzmy13 but sure, try it and if something breaks, I'll try my best to fix it. :good:
Just try installing on AEX rom, but not explore more.
kopter36 said:
It should work. I've no idea if my kernel will broke something on other LoS-15.1 based rom as I've only tested it on unofficial LoS15.1 by Cozzmy13 but sure, try it and if something breaks, I'll try my best to fix it. :good:
Click to expand...
Click to collapse
i've got bootloop on NOS....
caxwan said:
Just try installing on AEX rom, but not explore more.
Click to expand...
Click to collapse
AEX on libra? Can you give me the thread link?
ClaviluX said:
AEX on libra? Can you give me the thread link?
Click to expand...
Click to collapse
Sure, here the thread
4pda - mi4c
hanuraiga said:
i've got bootloop on NOS....
Click to expand...
Click to collapse
I can see that rom used Cozzmy13 kernel source which is the same tree of my kernel. Probably something changed in boot.img ramdisk for NOS kernel. I try to make anykernel patcher tonight.
Sidenote : HateKernel 1.3 already compiled with GCC 5.3.1 (ubertc-5.3.X) and booted up properly. Will released tonight with some other changes.
kopter36 said:
I can see that rom used Cozzmy13 kernel source which is the same tree of my kernel. Probably something changed in boot.img ramdisk for NOS kernel. I try to make anykernel patcher tonight.
Sidenote : HateKernel 1.3 already compiled with GCC 5.3.1 (ubertc-5.3.X) and booted up properly. Will released tonight with some other changes.
Click to expand...
Click to collapse
Thanks guy! You are really great!
kopter36 said:
I can see that rom used Cozzmy13 kernel source which is the same tree of my kernel. Probably something changed in boot.img ramdisk for NOS kernel. I try to make anykernel patcher tonight.
Sidenote : HateKernel 1.3 already compiled with GCC 5.3.1 (ubertc-5.3.X) and booted up properly. Will released tonight with some other changes.
Click to expand...
Click to collapse
Awesome... I'll be waiting
Is this kind of kernel features only available on kernel version 3.18.xx or is it also available on kernel version of 3.10.xxx
flammenwerferx said:
Is this kind of kernel features only available on kernel version 3.18.xx or is it also available on kernel version of 3.10.xxx
Click to expand...
Click to collapse
Most of those features are not limited to 3.18.xxx kernel. I've seen most of it implemented on Nexus 5X's custom kernel which share same kernel version with our device with the only exception is Qnovo charging driver. In fact, I've seen some of those features implemented on 3.10.9x which arent upstream to latest version at all.
HateKernel-1.3 is up
Changelog ;
-upgrade compiler to UBERTC-5.3.X (GCC-5.3.1)
-revert overclocking code until I found (if possible at all) working code
-proper undervolt to keep thermal-throttle a bit manageable
Click to expand...
Click to collapse
P.s: Not much changes in this version because I'm currently on holidays. Regarding kernel-patcher (AK2/lazyflasher), I'm currently still learning to do that. Very sorry guys. Development for more feature and upstream will continue soon.
To-do list ;
-upstream with latest CAF tag for msm8992
-upstream security patch
-Boeffla wakelock blocker
-backport zRam, F2FS and ext4 driver
-Adreno idler
Click to expand...
Click to collapse
I'm open to any suggestion to add other feature, just make sure its reasonable. Would be a great help too if you can point me to the commit if available.
Thanks @kopter36
HateKernel 1.3 intalled on my phone.
AEX Rom, without trouble on booting.
kopter36 said:
Changelog ;
P.s: Not much changes in this version because I'm currently on holidays. Regarding kernel-patcher (AK2/lazyflasher), I'm currently still learning to do that. Very sorry guys. Development for more feature and upstream will continue soon.
To-do list ;
I'm open to any suggestion to add other feature, just make sure its reasonable. Would be a great help too if you can point me to the commit if available.
Click to expand...
Click to collapse
Well, I'mma just suggesting these
1. KCAL Advanced Color Contol [with satutation, contrast and etc. Control]
2. Faux Sound Control [this really useful especially if somebody is experiencing a hissing noise on their headset, so they can reduce the output volume through this control]
3. Intelliplug or any hotplugging [only if it's really necesarry]
4. Adreno idler / booster of course (You've mentioned)
5. Upstreaming to the latest CAF (You've aforementioned)
6. ZRAM LZ4 Backport (On your to-do list)
7. Some kind of power efficient workqueue maybe
8. So-called boeffla wakelock (if i ain't mistaken the name)
PS : Anyway, undervolting seems working flawlessly, I've never reached 50°C now on normal chatting usage (usually it is around 50-55°C after one hour usage)