[KERNEL] [A.9] A2N Kernel for Galaxy S8/S8+/Note8 (Exynos) [CPU/GPU OC/UV] [Charger Control] [Thermal Control] [R62]
- Thread starter ace2nutzer
- Start date
Aaaace...don't tell me you did what I think you did
why did you do this. It wasn't redundant
How do I rollback
why did you do this. It wasn't redundantHow do I rollback
R61 was focused on smooth scrolling, fast reaction and better battery life, at the cost of lower bench score in multi-core.
R62 will fix that, without to loose the other benefits from R61.
Rollback is not possible at this moment.
Sorry for the inconvenience.
R62 will fix that, without to loose the other benefits from R61.
Rollback is not possible at this moment.
Sorry for the inconvenience.
Thank you very much for your continued efforts man
it's good that you focused on fast reaction because I noticed especially on Twitter scrolling that older releases were jittery but now it looked very smooth
Ace does the Kernel already make use of compilation flags (o3, thinlto, etc), arm optimized asm for mem ops, etc, to improve CPU performance? Or can this stuff not be implemented?
Yes I am. But I have some serious stability issues right now, may just be my silicon, may be the kernel. No panics, no demsg.
Hi Dev! I have a question for you
Is the new version has the CPU default temp limit (or boot temp limit, idk what it is called) at 57c ?
I feel that the phone is quite sluggish before the A2N settings apply, so I check the CPU temp with AIDA64 and the temp is peaked at 57 and clock speed is very low on big core.
I'd love to have the default temp increase to like 65 or 70c, so it will be faster.
Thank you so much!
Is the new version has the CPU default temp limit (or boot temp limit, idk what it is called) at 57c ?
I feel that the phone is quite sluggish before the A2N settings apply, so I check the CPU temp with AIDA64 and the temp is peaked at 57 and clock speed is very low on big core.
I'd love to have the default temp increase to like 65 or 70c, so it will be faster.
Thank you so much!
to me the processor easily reaches 95 degrees without losing performance
A13 is very different from A9. It creates a series of new problems to deal with.
Still waiting for Ace's response on my previous question. It's a very important one I think
Yes already fully optimized except LTO as it's not supported with our sources. I don't want to add further bugs. The kernel doesn't need such extreme low-level code optimizations since it's smart enough. But applied to the ROM LTO can make big performance improvements, especially for performance sensitive binaries like ffmpeg and the other software codecs.
No, sorry, it's max 60 °C to avoid overheating after wiping dalvik-cache.
I see, that's also okay. that answer the question why my phone is weirdly cool during the optimization (I always put it on top of my air purifier after the dalvik-cache wipe since it should be quite hot lol)
Hi Guys,
even the fact that I'd stated that I'll no longer update this kernel ....
But I couldn't let it be and therefore ....
HERE WE GO AGAIN:
Changelog
A2N Kernel R61
- RAM: improved memory management and fixed bug
- USB: fixed tethering instability issue (needs more testing)
- GPU: trigger kernel panic on GPU fault instead to issue a soft-reset
- Removed buggy gaming_mode
- GPU power-policy: force to use "coarse_demand" on suspend if "always_on" is enabled - saves battery (around 30 mA!)
- CPU/GPU DVFS: reduced "gpu_dvfs_sleep_time" from 8 to 4 ms
- GPU: fixed soft-reset issue caused by buggy HMP driver - this should fix GPU freezes and lags!
- HMP: fixed bugs and adjusted tunables to be more aggressive - (faster and smoother)
- CPU: updated ondemand gov
- CPU: updated input-booster driver to be more efficient (more smooth, less battery draining!)
- GPU: disabled shader cores hotplugging for better performance!
- Updated ramdisk
A2N Kernel Control V61
DOWNLOAD KERNEL
- CPU/GPU DVFS: added ability to check "Peak Temperature"
- Misc: LED-RGB: added power control
- CPU-BIG: removed CPU-Hotplug feature (redundant)
- GPU: replaced "Gaming Mode" with "Boost"
- GPU: added power-policy for "Always On"
- CPU-BIG: merged "Input Booster" into "Boost"
- CPU-LIT: removed "Boost" (redundant)
- Audio: moved "PM-QOS" to "Debug" menu
- Fixed bugs and improved performance
Flash and enjoy!
ace.. i have to say the latest build is really conservative while sleeping, it's literally 1 hrs 10 minutes per 1%
i have never seen my phone so calm like this
Sure you get around + 1 - 2 MB RAM if you compile the boot.img with -O2 instead of the higher optimizationslevel -O3 lol.
The zImage or AIK? Just saw this and was like lol. Ivan(the los dev) did this.
zImage ....
Ramdisk you could use gzip compression instead of LZ4 to save some more RAM... but that will make booting as slow like the Samsung stock kernel.
Eeh... don't feel like it's worh it, boot is already taking ~30s is it faster in your kernel? If so, how did you manage to lower boot times?
As I already said, you can compress your ramdisk with LZ4 in AIK (if not already), instead like in stock kernel with slow gzip compression.
For me the first SAMSUNG boot-logo disappears 2x faster.
I have lineage boot logo bc rom, but yes i think it is compressed with LZ4 already.
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So far I didn't change the source code since R62. But R63 is planned as a final release. It'll solve some regression in HMP and GPU driver. In addition it'll bring back some removed features as requested by some users from Play Store.1I think that A2N Kernel Manager app needs to change the way profiles are applied. For example, due to my weak battery, if I run Big at 2652MHz and I crash while I'm at it, once I reboot and A2N Manager tries to apply the settings, my phone immediately crashes again, and it starts doing this cycle infinitely. In my humble opinion, I think people should have the chance to use the more traditional Profiles menu where they can choose separately the one they want to load from the ones they make AFTER the A2N Manager loaded and did the license check. That way the phone won't crash in these circumstances unless the user makes it happen again.1
Like the a2n app loads a default profile and you need to load the wanted profile yourself?1
Check in debug menu. There are 2 options. Read carefully what they do.
It's even possible to use both at the same time.1
No, it'll not. Read the changelog.Thing is that option will completely reset my profile. At the end of the day it's the same as wiping app data. My point here is that I don't want to lose all my settings to an unstable CPU frequency. Resizing ZRAM is a pain everytime.
Either way I understand that implementing a profiles system in the app would probably be very taxing. So that's no big deal. This "disable restore settings" options will still come in fairly useful. Thanks for pointing it out
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78Revive your Samsung Galaxy S8 / S8 Plus phone in 2023!
Fastest custom kernel world-wide with lots of innovative features!
Supports all S8 / S8+ Plus / Note8 Exynos Variants Running Android 9
A2N Kernel Special Features
- Google Play - certified device
- SafetyNet: OK
- 100 % compatible with latest Magisk
- Banking apps works fine
- Charger control for faster charging
- Battery IDLE and battery care
- Stable CPU OC up to 4 x 2,8 GHz
- Stable GPU OC up to 20 x 839 MHz
- Adjustable CPU / GPU - Max Temp
- Adjustable Battery Max Temp
- Voltage control for all clocks (CPU lit/big - GPU - RAM - bus clocks etc..)
- Fixed time to full battery
- Flashlight tuning
- Wireguard backend support - always latest version
- DriveDroid backend support
- Dex with any HDMI adapter - thanks @ Barna Keresztes
- Samsung Dex: WQHD support with every adapter - thanks @ craftingmod
- Higher SOT - with new battery up to 10 h, with old battery see screenshots
- Wi-Fi calling & VoLTE works
- S8: RAM upgrade - 3679 @ 3717 MB
- Note8: RAM upgrade - 5339 @ 5376 MB
- SELinux in permissive mode - thanks @Noxxxious
- DRM - L3 stable streaming
- Replaced SSWAP with zRam (RAM compression) - with fast LZ4 compressor
- Added backend NTFS, CIFS and NFS support
- Removed enforced device encryption - you can enable it in Android security settings
- HMP driver fix
- Added extra gamepads drivers: Xbox / Sony PS / Nintendo Wii
- Ability to set different CPU Freq while screen ON/OFF
- Ability to use only the little CPU
- Proper support for Korean version (proper Wi-Fi power)
- and many more ...
This Kernel Aims are to
- reduce the power consumption
- reduce device heat
- improve the performance
- make it more smooth
- reduce RAM usage
- improve RAM management
- extend device features
- and many more ...
A2N Kernel Control - App Features
Best way to tune this kernel to your needs
Note: 3-party kernel manager apps do not work with this kernel.
-- Charger control
-- Battery care
-- Battery IDLE mode
-- Battery thermal control
-- Custom resolution for HDMI/DEX
-- CPU/GPU OC control with voltage control
-- Limit CPU max_freq on suspend
-- CPU/GPU governor tuning incl. input-booster
-- CPU/GPU DVFS thermal throttling control (ability to adjust the max allowed CPU/GPU temp)
-- GPU power-policy always_on
-- Performance profiles
-- SWAP/zRam
-- Backend Network stuff like NFS, CIFS, WIREGUARD etc..
-- Wi-Fi-Band selection
-- Torch brightness control
-- Notification LED-RGB - adjust blink_on, blink_off delay
-- Accelerometer calibration
-- Load kernel module - NTFS.
-- Advanced Power Menu - ability to reboot to recovery / download-mode
-- And many more!
- Settings --> Phone Info --> Software info --> build number (tap 7 times)
- Tap 2 times the back-key
- Developer settings --> enable "OEM unlock"
- Download TWRP for S8 / S8+ / Note8 accordingly (the .tar version, for ODIN flash over PC)
- Download latest A2N Kernel for S8 / S8+ / Note8 or for Korean variant: S8 / S8+ / Note8 accordingly and put the file in USB-thumb or in micro-sd-card
- Download latest Magisk.apk
- Rename Magisk.apk to Magisk.zip and put the file in USB-thumb or in micro-sd-card
- Power off
- Boot in Download-mode
- Flash the .tar twrp file with ODIN (disable "auto-reboot" and "reset time")
- Reboot directly to TWRP
- wipe ---> format data ---> "yes" (type yes) and ENTER.
- Flash latest A2N Kernel
- Flash Magisk.zip
- Optional but recommended: flash AdAway_hosts_patcher_g95x.zip (battery drain fix for vanced YouTube and vanced YT music)
- Reboot to system and enjoy !
- Note: first boot takes around 15 minutes for proper app optimization !
Update A2N Kernel
- Flash Magisk.zip
- Reboot to system and enjoy !
Current Bugs and Changelog
FAQ
Disclaimer
I am not responsible for anything that happens after flashing the work provided here.
Sharing is caring, so according to the (much unwelcomed) rule 12 you can use my open source on GitHub without my explicit consent or credits. But this is where the caring stops as I do not allow you to use any of my own provided files (except for unmodified stock files). Section 3 of this rule states that you can try to bypass my explicit consent by releasing it as your own when you succeed to make significant changes to the work, otherwise i'll report you and your thread will be removed.
Credits
Linus Torvalds - Linux kernel
Google - Android kernel patches
Samsung - device kernel source
@corsicanu - TWRP recovery - original thread
@S.AMU for providing FTP-Server
000webhost - Webhosting
@Noxxxious for the nice disclaimer text
XDA members - Reporting bugs
Minimum stable version: R54
Contributors
ace2nutzer
Source Code: https://github.com/ace2nutzer/Samsung_dreamlte_Kernel33Buglist - A2N Kernel R62
- None
A2N Kernel R62
- Fixed instability issues
- Fixed performance regression
- Updated LMK driver and optimized memory management
- CPU/GPU: updated ondemand gov
- CPU/GPU: updated DVFS driver to handle even little CPU if needed lol
- Updated HMP driver for higher performance on multi-thread
- Updated input booster for max smoothness
- Fixed some bugs in video/camera driver
- GPU: updated mali driver
- Updated devfreq driver (system clocks)
- Enabled TDMB for korean models - required for FM radio
- Enabled zRam @ 75 % by default
- CPU boost + input booster enabled by default
- Set boot DVFS temp @ 75 °C (to speed up dalvik-cache compilation) and @ 55 ° on boot_completed to reduce the device heat for normal daily usage
- Updated ramdisk
A2N Kernel Control V62
- added game boost level - from low to high+
- updated powersave profile
- CPU/GPU: updated voltage control
- updated theme to my custom dark-mode
- better handling of restoring app settings
- updated app defaults
Older Changelogs
18FAQ
Q: With which ROMs this Kernel is 100 % Compatible ?
A: Currently only with Android 9 custom ROMs, but Samsung stock ROM is recommended.
Q: Is this Kernel 100 % Safe ?
A: Yes.
Q: Will this Kernel Overheat the Phone if I use Highest Settings ?
A: No, you can't do anything wrong. Your phone has hard- and software overheat protection.
Q: How to Revert all Changes Made by this Kernel ?
A: Flash latest 3-parted stock ROM with ODIN or flash the Samsung kernel from my download site.
Q: How to bypass SafetyNet ?
A: Anable MagiskHide in Magisk app.
Q: How i can Tune this Kernel ??
A: Everytime you install or update this kernel you will face an red (demo) app "A2N Kernel Control..." open this app, and it'll redirect you to Google Play to get the full version (blue app).
Q: Can i use and Tune your Kernel with other Kernel Manager Apps ?
A: Yes, but you need first to unlock kernel with the A2N app full version.
Q: I've Installed the Full Version of the App, Will it Change any Kernel Settings by Default if i do not Change them ?
A: No, default app settings = default kernel settings.
Q: I've the Full Version of the A2N Kernel Control App, Do i still need the Demo Version of the App ?
A: Yes, there are some special features in-app-menu like "Fake Enforce" and debugging features for easy bug reports.
Q: How to Charge from 10 % to 100 % In just 1 h ?
A: E.g. set "AC Current Max" and "Maximum Charging Temperature" to the Max.
Q: How to get Max Speed for e.g. Highest FPS in Games ?
A: Set BIG / LITTLE CPU and GPU Freq to the Max, but avoid to use "unsafe" Freq's.
Then set CPU / GPU --> DVFS --> "Maximum Temperature" to the Max.
Now you can even cook an egg on your phone !
Q: Will my Custom A2N Settings Survive if i install Stock Kernel and then going back to A2N Kernel ?
A: Yes, as long as you don't uninstall it.
Q: Can i use your Kernel Control App with other Custom Kernels ?
A: No, it's not universal kernel manager app.
Q: My A2N App is Crashing after an Update, how to fix it ?
A: Re-install it. If it doesn't help, wipe dalvik-cache in recovery.
Q: My A2N App shows: "Please check your internet connection" - But i've good internet connection. - How to fix it ?
A: Settings --> network settings --> use private DNS server like "dns.adguard.com" - confirmed to work by user @Arnz09 - see his post here.
Otherwise send me a pm with the screenshot and you current location (city)
Q: Why I get lower benchmark scores with this kernel compared with the Samsung kernel ?
A: This kernel uses by default Max CPU/GPU DVFS Temp 65 °C to reduce the device heat. You can buy the full version of the A2N app to set the DVFS Temp up to 100 °C to get higher scores than on stock kernel.
Q: Why the Android Battery setting "fast charging" has no effect on this kernel ? - It charges always with around 1500 mA.
A: Because it would conflict with the built-in charger control.
The default charging current of approx. 1500 mA means no fast charging by default, even if you actually see "fast charging" in the notification section. This is also useful to reduce battery stress and device heat. To charge even with higher speed/current than on stock kernel you need to buy the full version of the A2N app.
Q: Why I've to pay money for just changing kernel settings ?
A: Well quality has its price. Also nobody forces you to use this kernel.
You can flash other custom kernels or flash the Samsung stock kernel from my download site. Good luck !
Q: When we get an update ?
A: This kernel is almost 100 % stable and works very well. Also this phone is now a bit "old" and therefore don't expect frequent updates.
Also don't ask for ETA's and if you do anyway, I'll ignore.
Q: How to fix audio stutering ?
A: Increase the PM-QOS-LIT / PM-QOS-BIG Freq in A2N app in debug menu --> "Audio" section.
Q: What is the benefit of editing the voltage table ?
A: to increase OC stability increase voltage and to decrease the device heat, decrease voltage. Last one will improve performance due to less throttling ! So it depends on your needs.
Q: How much is safe to undervolt ?
A: approx -50 mV is considered to be "safe".
Q: How to Report Bugs ?
- Please DO NOT report bugs if you are:
--- using "unsafe" Freqs
--- not using the latest release !
--- not using Samsung stock ROM (based stock ROMs are custom ROMs !)
A: Open the red A2N Kernel Control demo app and check in-app-menu (3 dots) then "Debug" and then on "logcat and dmesg" if you faced an app crash or if some features didn't work.
If the phone rebooted randomly, then tap on "last_kmsg". You will find the logs in your internal storage. After that you can attach them here in your bug report, by clicking "Attach files".
ROM:
Kernel version:
A2N app version:
BUG:
How to reproduce:
Same bug with stock kernel ? : YES / NO
Download stock kernel for bug reference: S8 / S8+ / Note8
BUG REPORTS THAT DO NOT FOLLOW THESE RULES WILL BE IGNORED !!!12Hello dear Friends i'm back with a great Changelog ...
Kernel 20191019
- FULL Android 9 Pie Support
- Based on Stock Source Code DSI1
- Ramdisk DSI1
- Compiled with the OFFICIAL ARM/Linaro GCC 8.3
- Optimized Memory Managent
- Improved Performance
- Improved Battery Life
- Reduced Device heat
- More Responsive
- Fixed Laggs (especially for some 2D Games)
- Increased Efficiency
- RAM: 3485 @ 3711 MB
- Unlocked higher CPU/GPU Freq Steps - Thanks @Noxxxious
- SELinux in permissive mode - Thanks @Noxxxious
- Disabled SSWAP
- Added zRam Support with fast LZ4 Compressor
- Added KSM Support - patched for Android by me
- Optimized Input Booster
- Fixed very bad CPU IDLE
- CPU: Interactive @ conservative gov - for higher efficiency
- Added Wireguard Support
- CPU: Cluster 0: Screen ON min_freq 455 @ 715 MHz to Fix Lags - 455 MHz Step is used for Screen OFF
- Compiled with DEFAULT_USE_ENERGY_AWARE / WQ_POWER_EFFICIENT_DEFAULT - for better Battery Lifetime
- Optimized Crypto, NEON SIMD Hardware Acceleration (e.g. faster device encryption due of hardware acceleration)
- Disabled HMP since it serves nothing - Hardware doesn't allow to use real cpu_hotplugging ...
- Added Charger Control 2.0 by me - Allows to configure custom max input current from 100 - 3000 mA in 100 mA Steps separately for AC / USB 2.0 / USB 3.0 / Wireless - that means real Fast Charging even with Screen ON - Allows even to charge at max current possible with 3rd-party Chargers !!
- Added Flashlight Torch Control - You can adjust Brightness of your Torch from 1 - 15 - Default/Stock Kernel is just 5
- SELinux: Removed Audit dependency - Thanks @ kerneltoast && arter97
- Added Support for F2FS
- Accurate remaining time to full charged battery
- init.d Support
- And many more Kernel Tweaks - i can't list them all here ... changelog is already too long isn't it ?! :laugh:
A2N Kernel Control V1.4
- The best Way to manage this Kernel for full functionality (3rd-party Kernel Manager Apps will not work properly with this Kernel)
- Compiled with API 28 Android 9 Pie
- Power: Charger Control - Allows to configure custom max input current from 100 - 3000 mA in 100 mA Steps separately for AC / USB 2.0 / USB 3.0 / Wireless - that means real Fast Charging even with Screen ON - Allows even to charge at max current possible with 3rd-party Chargers !!
- Added switch for "Adaptive Fast Charging" so u can directly toggle AFC in the App.
- Ability to check actual accepted charging current and Input Voltage
- CPU: OC Control: Cluster 0: up to 2002 MHz and Cluster 1: up to 2808 MHz
- CPU Governor tuning: Adjust up_threshold to balance between Battery Lifetime and Performance separately for each Cluster
- GPU: OC Control up to 839 MHz
- Hardcoded Performance Profiles:
- --> Powersave (Underclocked)
- --> Balanced (Kernel Default)
- --> Performance (Overclocked)
- Misc: switch for zRam, KSM
- Misc: Torch Brightness Control - up to 3 times brighter flashlight than with a stock Kernel !!
- Misc: Ability to load kernel Module for CIFS and NFS with just one Tap
- Misc: Accelerometer Calibration
- Debug: u can call this Menu over the App built-in Menu (3 dot) - ability to save logcat and dmesg with one tap to your sdcard ..
If u've any Questions, feel free to ask here.
Enjoy your new A2N Kernel !10New Build is Up !!
Changelog
Kernel 20200519
- Source Update DTA6 -> DTC6
- Charger Control: allowed higher chg_temp - should charger faster, especially for 3000+ mA
- defconfigs: re-enable Gear VR related drivers
--------------------------------------------------------------------------------
Updated also TWRP Kernel.
