[KERNEL][CUSTOM] Eureka kernel for all variants of Galaxy A20/A20e for android 10(Q) & 11(R) & 12(S) ROMs - Samsung Galaxy A20 ROMs, Kernels, Recoveries, & Ot

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Hi all,
this is the thread for a custom kernel i made for Samsung Galaxy A20 and A20e
The custom kernel has been named Eureka which is a greek work which means "I have found the solution". This multi-purpose kernel is the solution for battery, gaming, performance for A20 and A20e. On creating this kernel, I believed that 1 kernel can be all of the above if properly tweaked!
As from Eureka R9.0, four kernel variants are available inside 1 same zip. This has been made possible using AROMA Installer.
Compatibility:
This kernel is compatible with AOSP GSIs/ROMs, OneUI2 and OneUI3. As from R9.0, there is only 2 variants of zip to download. One is called EMS and the other one is called HMP. Continue reading to learn more about them.
FEATURES:
* Disabled Samsung security features
* Enabled all governors + added other governors
* Overclocked CPU as follows:
BIG Cores: from 1560 MHz to 2288 MHz.​LIL Cores: from 1352 MHz to 1794 MHz.​* Underclocked CPU as follows:
BIG Cores: from 936 MHz to 208 MHz.​LIL Cores: from 839 MHz to 208 MHz.​* Added GPU thermal and voltage control
* Added latest boeffla wl blocker V 1.1.0 and disabled some wakelocks
* Network speed improvement
* Enable zram support and set default compressor as zstd.
* Switch to a lower charging voltage more quickly.
* GPU max frequency overclocked from 676 MHz to 1300 MHz
* Implemented Dynamic FSync 2.0
* Implemented a custom hotplug driver to enhance battery management
* Implemented Power Suspend driver
* High torch brightness on custom roms/gsis
* Has Spectrum support
* Automatic detection of magisk - If u are rooted, u don't need to flash magisk after kernel.
* Upstreamed kernel version from 4.4.177 to 4.4.302
* Built with Vortex Clang 14 toolchain with LTO. Reason: Better performance
* Support for EMS (Exynos Mobile Scheduler) added
Please read the changelog on github for full list of changes.
KNOWN ISSUES:
* Maybe ADB cannot be used at the same time as MTP
SOME MINOR TWEAKS FOR BEST GPU PERFORMANCE:
* Set GPU power policy to "always on"
* Set min and max GPU frequency to 1200/1300 MHz
* Disable GPU thermal manager to prevent GPU frequency from dropping
* Games don't require high CPU frequency because they depend more on GPU. You can therefore decrease CPU max frequencies to reduce heating of the device.
We have developed our own kernel manager called EKManager which is a fork of HkTweaks. It is compatible only with Eureka Kernels. You can download it from here:
LINK: Download EKManager app
Contact info:
Developers of Eureka Team:
* Telegram: @Chatur27, @Gabriel260BR and @roynatech
Channel for Eureka future updates:
* Telegram: https://t.me/eureka_kernel
Official discussion group for A20/A20e:
* Telegram: https://t.me/Galaxy_A20_official
I'm grateful to KineSight for designing the logo.
* Telegram: @Kinesight
Reference about EMS kernel:
Energy Aware Scheduling (EAS) gives the scheduler the ability to predict the impact of its decisions on the energy consumed by CPUs. EAS relies on an Energy Model (EM) of the CPUs to select an energy efficient CPU for each task. Allowing to save up battery even further. EMS aka Exynos Mobile Scheduler, is a fork of EAS for Exynos. We ported to our 4.4.y kernel. As written above, EMS kernel is good for battery saving. Some words from kernel official docs: - EAS operates only on heterogeneous CPU topologies (such as Arm big.LITTLE) because this is where the potential for saving energy through scheduling is the highest.
EMS kernel + pwrutilx governor is very good at battery saving according to our test.
Reference about HMP kernel:
It's just the stock scheduler that comes with stock kernel. Basically it's the normal kernel.
What kernel variant to flash once inside AROMA installer?
1) AOSP Legacy Q/R/S - If you are using an old Eureka ROM which was released before February 2022, choose this.
2) AOSP Q/R/S (New) - If you are using an Eureka ROM built as from February 2022, choose this.
3) OneUI 2 - For any OneUI 2 roms (stock/ports).
4) OneUI 3 - For any OneUI 3 roms (stock/ports).
Download link for A20/A20e (Read above to know which version to download for your OS):
All releases of Eureka for Q/R/S ROMs/GSIs (including OneUI)
Source code for my kernel:
Kernel source on GitHub
If you love our work, thank us by donating. Your donation can help us rent a cloud sever to build kernels and roms faster
Link to PayPal: https://www.paypal.com/paypalme/chaturbaij

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Great work
Download link https://drive.google.com/folderview?id=131huI-6lQYC-IpJxUTMnJvoIOCN5C69Y
Install Magisk Uninstaller
Install kernel
Install Magisk 20.3
Reboot
You can install Magisk 20.4 later
Benchmarks
CPU 1395
GPU 276 975
Antutu: 140720

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I not that great with OP to know if this work will work with my phone the A20 205U and I get nevious with changing clock speed and having to tweak them later?

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techmanc said:
I not that great with OP to know if this work will work with my phone the A20 205U and I get nevious with changing clock speed and having to tweak them later?
Click to expand...
Click to collapse
This kernel has been tested by various A20 users. It should work on your device too. The kernel is pre-rooted with magisk 20.4
If you are facing issues, use the guide provided by Physwizz above.
You dont have to worry about changing clock speeds because they have been tested and they are stable. Only the 2184 MHz frequency gives random reboot on some A20.

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Chatur27 said:
This kernel has been tested by various A20 users. It should work on your device too. The kernel is pre-rooted with magisk 20.4
If you are facing issues, use the guide provided by Physwizz above.
You dont have to worry about changing clock speeds because they have been tested and they are stable. Only the 2184 MHz frequency gives random reboot on some A20.
Click to expand...
Click to collapse
I have Magisk 20.4 installed which file I d/l lets see if I cop/paste right
* Telegram: chatur2709
Download link for my kernels for A20:
EurekaRev3.9 for A205 using GSI or custom rom:
https://github.com/Chatur27/Eureka-k...A205.GSI.Q.zip
EurekaRev3.7 for A205 using ONE UI based roms:
https://github.com/Chatur27/Eureka-k...05.ONEUI.Q.zip
Source code for my kernels:
https://github.com/Chatur27/Eureka-kernel-for-SM-A205-Q
Last edited by Chatur27; Today at 05:18 AM.

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I'm keen to give this kernel a go. What version do I use if I am using the Ultimate Q S20 ROM?

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Chatur27 said:
Hi all,
this is the thread for a custom kernel i made for Samsung Galaxy A20 based on android Q (10).
The custom kernel has been named Eureka which is a greek work which means "I have found the solution". This kernel is the solution for both gaming and performance for A20.
Compatibility:
This kernel has 2 versions. One version works only on ONE UI (can be stock or debloated ONE UI) and the other version works on GSIs and custom roms (GSIs built specifically for A20). So, please download the correct version.
FEATURES:
* Disabled Samsung security features
* Enabled all governors except Schedutils governor.
* Overclocked CPU as follows:
BIG Cores: from 1560 MHz to 2184 MHz.
LIL Cores: from 1352 MHz to 1690 MHz.​* Underclocked CPU as follows:
BIG Cores: from 728 MHz to 312 MHz.
LIL Cores: from 449 MHz to 208 MHz.​* Added GPU thermal and voltage control
* Added latest boeffla_wl_blocker V 1.1.0 and disabled some wakelocks
* Network speed improvement
* Enable zram support.
* Switch to a lower charging voltage more quickly.
* GPU max frequency overclocked from 676 MHz to 1300 MHz
* Implemented Dynamic FSync 2.0
* Has Spectrum support
* FOR GSI:
* Fixed ADB and MTP.
* Set SElinux as permissive​
Please read the changelog for full list of changes.
KNOWN ISSUES:
* Random reboots when device is forced to run at 2184 MHz
SOME MINOR TWEAKS FOR BEST GPU PERFORMANCE:
* Set GPU power policy to "always on"
* Set GPU governor to "static"
* Set min and max GPU frequency to 1300 MHz
* Disable GPU thermal manager to prevent GPU frequency from dropping
* If you are on ONE UI and GPU keeps on changing when u force it at 1300 MHz, disable/remove devicehealthmanagerservice and gameoptimizingservice apps
* Games don't require high CPU frequency because they depend more on GPU. You can therefore decrease CPU max frequencies to reduce heating of the device.
My contact info:
* Telegram: chatur2709
Download link for my kernels for A20:
EurekaRev3.9 for A205 using GSI or custom rom:
https://github.com/Chatur27/Eureka-kernel-for-SM-A205-Q/releases/download/rev3.9/Eureka.Rev3.9_A205.GSI.Q.zip
EurekaRev3.7 for A205 using ONE UI based roms:
https://github.com/Chatur27/Eureka-kernel-for-SM-A205-Q/releases/download/rev3.9/Eureka.Rev3.7_A205.ONEUI.Q.zip
Source code for my kernels:
https://github.com/Chatur27/Eureka-kernel-for-SM-A205-Q
Click to expand...
Click to collapse
I have Magisk manager installed 7.5.1 not 20.4 installed I got both from the website it says unknow image format.

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burningcreation said:
I'm keen to give this kernel a go. What version do I use if I am using the Ultimate Q S20 ROM?
Click to expand...
Click to collapse
Ultimate Q is debloated ONE UI
So use the ONE UI version.
LINK: https://github.com/Chatur27/Eureka-...ownload/rev3.9/Eureka.Rev3.7_A205.ONEUI.Q.zip

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techmanc said:
I have Magisk manager installed 7.5.1 not 20.4 installed I got both from the website it says unknow image format.
Click to expand...
Click to collapse
Magisk manager is an app which controls root access
Magisk 20.4 is the latest root
Your download is probably corrupted. Slow internet can corrupt files.
Download it again and flash via twrp.

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Chatur27 said:
Ultimate Q is debloated ONE UI
So use the ONE UI version.
Click to expand...
Click to collapse
Thank you. I appreciate the work.

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great work :good: MTP works great

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When I have Quantum V2 kernel running I have the 'Advanced settings' option in Display > Full screen apps to hide the camera cut out.
When I install this kernel the option disappears.
Is this normal? Any way to fix?
Thanks.

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techmanc said:
I not that great with OP to know if this work will work with my phone the A20 205U and I get nevious with changing clock speed and having to tweak them later?
Click to expand...
Click to collapse
It will not work on the U models.
We have a locked bootloader.

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R4.1 works nice

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jajk said:
R4.1 works nice
Click to expand...
Click to collapse
Link https://drive.google.com/folderview?id=131huI-6lQYC-IpJxUTMnJvoIOCN5C69Y

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ninjasinabag said:
It will not work on the U models.
We have a locked bootloader.
Click to expand...
Click to collapse
So the U model just comes from metro I did ask via phone call if I can unroot my phone legally as they said yes but they would not do it so I wish I could sue metro for lying I all I said was it was a galaxy

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techmanc said:
So the U model just comes from metro I did ask via phone call if I can unroot my phone legally as they said yes but they would not do it so I wish I could sue metro for lying I all I said was it was a galaxy
Click to expand...
Click to collapse
A205u is the north American universal device.
You can unroot your device, They cannot unroot it for you, because you literally voided your warranty.
You are liable for any and all changes that you make to your device. Only you. Nobody else.

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burningcreation said:
When I have Quantum V2 kernel running I have the 'Advanced settings' option in Display > Full screen apps to hide the camera cut out.
When I install this kernel the option disappears.
Is this normal? Any way to fix?
Thanks.
Click to expand...
Click to collapse
I don't know about this issue
No one reported that before.
I don't know how is this feature related to kernel.
I'm on A10 using Eureka and these options are still there for me tho.

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Chatur27 said:
I don't know about this issue
No one reported that before.
I don't know how is this feature related to kernel.
I'm on A10 using Eureka and these options are still there for me tho.
Click to expand...
Click to collapse
Thank you. I might try doing a full wipe and installing.

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Is it working for Samsung SM-A205GN. I tried it in my SM-A205GN but the max frequency is 1560Mhz my phone is rooted and the gpu has 1300Mhz but GPU Mhz only reach 676Mhz