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[KERNEL][CUSTOM] Eureka kernel for all variants of Galaxy A20/A20e for Q & R based vendor ROMs

How is your experience with Eureka kernel?

  • Improves performance and gaming experience

    Votes: 30 83.3%
  • Improves gaming experience only

    Votes: 0 0.0%
  • Improves performance only

    Votes: 6 16.7%

  • Total voters
    36
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Chatur27

Senior Member
Jul 30, 2020
205
220
Moka
How can I enable SWAP on Eureka R7.0 without having to install 3rd party apps?
I'm on Illusion v1.7. I've had to go back to its stock kernel for SWAP.
ZSWAP is obsolete now.
ZRam is the new workaround.
You can enable Zram in any kernel manager or by installing the attached magisk module I made.
 

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Chatur27

Senior Member
Jul 30, 2020
205
220
Moka
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.
 

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  • 7
    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!

    Due to Samsung heavy changes in R vendor (Oneui 3), 2 kernels had to be made. One kernel is named Q/R and the one is called R. Q/R kernels can only be used on Q vendor based roms, that is, ONEUI 2.x, Q/R GSIs, Q/R Eureka Roms. R kernels can only be used on R based vendor, that is, ONEUi 3.x for the time being

    Compatibility:
    Each of the 2 above mentioned kernels has 2 versions. One version has enforcing selinux and the other one has permissive selinux. So, please download the correct version.


    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 lz4.
    * 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
    * 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 4.4.277
    * Built with Proton Clang 13 toolchain with LTO. Reason: Better performance

    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.

    Best kernel manager for Samsung A series devices is HkTweaks:
    LINK: https://github.com/corsicanu/hKtweaks/releases/


    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

    Download links for A20/A20e (Download accordingly):
    All releases of Eureka for Q based vendor ROMs
    All releases of Eureka for R based vendor ROMs
    Customize Eureka with different frequencies (Flash in recovery)

    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
    😭😭😭 @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!)
    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
    The GSI link is broken, also I would like to know, why is SELinux set to permissive in this kernel?
    Permissive for GSI
    Enforcing for OnaUI