[KERNEL][EOL][10][OneUI/LOS][G96xF/FD/N] RZ Kernel for Samsung Galaxy S9(+) Exynos

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Senior Member
Apr 15, 2008
50.756096, 7.092858
How was the standby drain? What twrp did you use? I used of TWRP. The chrome is super dark and cant see. Can you confirm this or im an isolated case? Do you think its because of not using twrp that bugged mine? Hope you can help me. Thanks!
It's just flashed, so I connot say anything about the standby drain.
I'll hope to get an improvement here.
With stock kernel (using Alexis Rom 1.8) I loose about 15% per night :crying:
Using Airplane-Mode I loose only 2% per night.

As I remember, with Alexis Rom 1.8 it's remommendated to use 3.3.1-1, not 3.4.x.

The chrome is super dark
Excuse me, but what's that?
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Senior Member
Aug 21, 2014
It's just flashed, so I connot say anything about the standby drain.
I'll hope to get an improvement here.
With stock kernel (using Alexis Rom 1.8) I loose about 15% per night :crying:
Using Airplane-Mode I loose only 2% per night.

As I remember, with Alexis Rom 1.8 it's remommendated to use 3.3.1-1, not 3.4.x.

Excuse me, but what's that?

Something about chrome on my device. Like you cant see the webpage even tried it with chrome beta and the webpage is just black and at the home page of chrome is black and you'll only see pictures but its pixelated the text and background is black. Tried using other kernel and the chrome is fine. Maybe because im using twrp 3.4. i thought i is necessary for his other build. Im gonna try to use

For me 15%/night (assuming >5hrs standby) is quite good if you have everything on. Mine looses maybe 15% on a 5 hrs standby with everything off besides wifi with no aod. Anyway ill try to use this again tomorrow with build. Thanks for replying! Sorry for my bad english.


Senior Member
Aug 21, 2014
Are you talking about the Google Chrome Browser?

15% per night is with WLAN, BT and 4G, but AOD and NFC off.

Here is a very old Galxy Note 3, it takes only 3% per night with WLAN, BT and 4G.

Oh sorry, yes. Im talking about the google chrome browser app. Its bugged on my device when i installed this specific kernel and 1.8 dev build with twrp 3.4. I can't even update apps like Android system webview just after clean install. So im deducing my problems with having the wrong recovery version why that bug keeps on happening and not having the phone go into deep sleep (doze)

My poco f1 goes through the night like a knife on a butter. maximum of 5% with wifi on also and everything off (constantly receiving notifications on apps like fb messenger). So im kinda stuck why my s9 can't do it with less apps installed and a fresh installed ROM. Cant show it to you right now as i kinda soft brick my s9 and not having my laptop around me this time.
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Senior Member
Dec 18, 2014
Xiaomi Poco F3
There seems to be a problem with the latest build and Magisk. It bootloops when Magisk is enabled.
That's not kernel fault. Use twrp and check if it works, this kernel won't be updated and I saw your post on lineage 15.1 thread, why are u using 15.1? U like old stuff.. There's official 17.1 and roms like havoc, etc. I tested havoc with rz kernel & magisk few weeks ago and it was working.

Enviado do meu SM-G965F através do Tapatalk

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    * Your warranty is now void.
    * I am not responsible for bricked devices, dead SD cards,
    * thermonuclear war, or you getting fired because the alarm app failed. Please
    * do some research if you have any concerns about features included in this kernel
    * before flashing it! YOU are choosing to make these modifications, and if
    * you point the finger at me for messing up your device, I will laugh at you.*/

    RZ Kernel aims for as stock experience as possible. It is made from Samsung's stock kernel with stability updates thanks to great guys who made ELS (exynos-linux-stable) branch
    It also attempts to increase overall multitasking performance while maintaining good battery life with proper settings

    • Adapted new Samsung EMS scheduler from Samsung 4.14 kernel (with 16ms PELT)
    • Gaming optimizations (reduce heat while maintaining performance stability)
    • Disabled battery-hogging WAKELOCKS
    • WireGuard and DriveDroid support
    • Security patch fixes adapted

    Thanks to corsicanu for helping me with initial kernel support

    XDA:DevDB Information
    RZ Kernel, Kernel for the Samsung Galaxy S9

    Source Code: https://github.com/diepquynh/android_kernel_samsung_universal9810

    Kernel Special Features:

    Version Information
    Status: Testing

    Created 2020-04-11
    Last Updated 2020-08-27
    Second public build is coming, and this will be the final build of the kernel project!
    We have been going through lots of ups and downs in the testing group, so here are the results

    • Fixes zram on boot
    • Adapted a new kernel scheduler, supporting 32/64-bit task scheduling
    • Critical scheduler performance fixes
    • Adapted newer vendor support

    As this is the final build of the whole kernel project, I'd like to say thank you to all supporters/developers who helped me improving the kernel. The whole project hasn't lasted long, but it was a great time. This and the RZ Kernel project for Exynos 8895 will also be abandoned, unfortunately

    Once again, thank you for all your support!
    Download link: Drive folder

    • 20200412: Initial release
    • 20200823 [FINAL]: Post #10
    Notices and Q&A

    • The kernel is based on tw10-android-4.9-q branch of ELS, which is currently at stable state from my experience
    • Other related features of the kernel were picked from other sources. Credits belong to the owner
    • The kernel's energy costs table is remade in favor of new EMS scheduler

    Questions and Answers (Q&A)

    Q: AnTuTu scores please?
    A: This kernel isn't made for benchmarks so let's not talk about it

    Q: My phone gets hot while using this kernel?
    A: Short answer: It's your own issue, fix it yourself. Nobody makes a kernel just to burn your hands

    Long answer:
    • Install Termux app from Play Store
    • Enable screen rotation, open Termux in landspace mode
    • Type this command: su -c top -d 2
    • A list of processes will appear and refresh with 2s interval. Find which process consumes the most CPU usage with [%CPU] column and the package name in ARGS column. You should see the culprit of your issue

    Reminder: There is no such thing as "I have nothing in background but the phone still heats up". There definitely something happen and 99% of the time it's some of the rogue apps running in background

    Q: Can you add X Y Z feature to this kernel?
    A: I want to keep the kernel clean and simple. However, if the feature is really useful, I'll consider adapting it with proper performance check before releasing

    Q: Installation procedure?
    A: Simply flash the kernel with supported ROM and forget. No Magisk reinstallation needed
    Updated initial release with latest defconfig base for DTC5 vendor