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

How is your experience with Eureka kernel?

  • Improves performance and gaming experience

    Votes: 52 86.7%
  • Improves gaming experience only

    Votes: 0 0.0%
  • Improves performance only

    Votes: 8 13.3%

  • Total voters
    60
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ANFOR7

Member
Jun 6, 2022
14
0
System: Havoc OS 3.12
Android: 10 (Q)
Samsung Galaxy A20 (SM-A205FN)
SELinux status: Enforcing
Kernel: 4.4.302-Eureka_R9.0_A205_Legacy_Q/R/S
#1 Tue Feb 8 05:30:15 UTC 2022

The system freezes in translation, so that nothing can be done, you have to reboot the device.
 

Mamo_grag17

Member
Nov 14, 2021
23
5
Samsung Galaxy A20
you are right and android 10 is so old why dont you use android 11 roms they may be a bit bad on battery backup that why I recommend you to use android 12.1 roms
I really recommend android 12 roms, those who are using GSIs are just who doesn't have any custom rom for their device, i have derpfest rom android 12 and it's awesome, the battery is really good comparing to oneui 3.1.
 
New Update of our Eureka Kernel and there OFFICIAL FEATURES for version R10

Downloads at our Telegram Channel (find on the first Post!)

  • Modifications to sLMK driver and its configs, to avoid LMK killing every app, but kill based on Linux kernel's task priority. Idle RAM usage decreased, multitasking improved.
  • Fix an old bug of Eureka Kernel, kernel panic if USB debugging is on, and the phone is connected to PC, and the user tries MTP mode. The fix was inspired by exynos9820 (Linux 4.14) usb driver.
  • Update Simple LMK driver to latest commit. Includes various memory and driver itself optimizations.
  • Upstream cfq I/O scheduler, F2FS driver in kernel
  • Enable misc configs for NetHunter support. (E.g. mac80211, Sysvpic, USBconfigfs drivers...)
  • Merge upstream patches for USB configfs HID driver. Used for NetHunter.
  • Misc improvments, hacks applied kernel tree wide
  • Rewrote mbcache driver - May be misc improvements in I/O operations on ext4 fs
  • Revert LZ4 driver changes
  • Adjust TCP Westwood parameters for better internet speed
  • /proc/kmsg is now toggleable. Use this command to control kmsg buffer:
    # echo 1 or 0 > /sys/module/printk/parameters/enabled

by Eureka Team
 

haiise

Senior Member
Nov 7, 2021
183
14
Samsung Galaxy A20
New Update of our Eureka Kernel and there OFFICIAL FEATURES for version R10

Downloads at our Telegram Channel (find on the first Post!)

  • Modifications to sLMK driver and its configs, to avoid LMK killing every app, but kill based on Linux kernel's task priority. Idle RAM usage decreased, multitasking improved.
  • Fix an old bug of Eureka Kernel, kernel panic if USB debugging is on, and the phone is connected to PC, and the user tries MTP mode. The fix was inspired by exynos9820 (Linux 4.14) usb driver.
  • Update Simple LMK driver to latest commit. Includes various memory and driver itself optimizations.
  • Upstream cfq I/O scheduler, F2FS driver in kernel
  • Enable misc configs for NetHunter support. (E.g. mac80211, Sysvpic, USBconfigfs drivers...)
  • Merge upstream patches for USB configfs HID driver. Used for NetHunter.
  • Misc improvments, hacks applied kernel tree wide
  • Rewrote mbcache driver - May be misc improvements in I/O operations on ext4 fs
  • Revert LZ4 driver changes
  • Adjust TCP Westwood parameters for better internet speed
  • /proc/kmsg is now toggleable. Use this command to control kmsg buffer:
    # echo 1 or 0 > /sys/module/printk/parameters/enabled

by Eureka Team
can we download this update only from telegram ?
 

haiise

Senior Member
Nov 7, 2021
183
14
Samsung Galaxy A20
I have a question for eureka team ( sorry I am not using telegram so I cant write there ) do you guys thinking about re-rolling android 11 roms with latest security patches and new kernel ? my personal opinion it would be very good and a20 would be more stable and would have better performance
 

Mamo_grag17

Member
Nov 14, 2021
23
5
Samsung Galaxy A20
I have a question for eureka team ( sorry I am not using telegram so I cant write there ) do you guys thinking about re-rolling android 11 roms with latest security patches and new kernel ? my personal opinion it would be very good and a20 would be more stable and would have better performance
They said that they won't continue developping it, so no hope for those features bro.
 

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  • 10
    EK A20&A20e XDA.jpg

    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


    1619984176140.png

    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
    4
    Eureka R7.5 update

    Changelog:

    → Upstream Linux Kernel Version from 4.4.270 to 4.4.277
    → Enabled back 208 MHz frequency for big and little cores.
    → DTB is now used to customize Eureka features such as CPU and GPU frequencies.
    → DTBO is only used to disable dm-verity as from now.
    → Added a new flashlight control driver which will be used on AOSP/LOS based ROMs. It will also fix low flashlight issue on GSIs. This new driver does not interfere with camera (which was causing dark photos for some A20 users) Footej camera app is recommended for custom roms.
    → Imported latest Samsung updates from A305F R kernel source.
    → "Samsung A10 1.2A input charging current" feature still depends on Eureka dtbo. Will fix it on next update
    → Further overclocked BIG cores from 2184 MHz to 2288 MHz and LITTLE cores from 1690 MHz to 1794 MHz.
    → Fixed wrongly set GPU throttling frequencies.
    → Updated WireGuard vpn driver to latest version - v1.0.20210606
    → Some other minor optimizations.
    2
    The GSI link is broken, also I would like to know, why is SELinux set to permissive in this kernel?
    Ik. Use this temporary one:

    I also made a gsi kernel with enforcing SElinux. Usually, it's only available for those who use telegram :)

    So, I made SELinux permissive because many GSIs boot only with permissive SElinux. Gsi permissive will boot any GSIs but enforcing has 50% chance not to boot. That's why I shared only permissive here because I don't want newbies to get stuck in bootloop and complain that kernel is not working
    2
    I'm keen to give this kernel a go. What version do I use if I am using the Ultimate Q S20 ROM?
    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
    2
    😭😭😭 @Chatur27 Is the A20 going to get a bit of v6.1 loving like the A10?
    Hi.
    Thanks for your interest in Eureka 😊
    The thing is that there is an issue(Bluetooth not working) with R6.1 on arm64 ROMs. That's why I haven't released it yet. Sorry for the wait :(

    If you don't use Bluetooth, I can send u the kernel to use (only on telegram, not here!)