[KERNEL][11.0.0] Sultan Kernel [May 6, 2021]

Search This thread


New member
Apr 8, 2021
Hi, could someone help. I have a pixel 4xl, unlocked bootloader, flashed Lineage W/ Micro G Android 11, Unlocked Root W/ Magisk. When I goto Fastboot the Sultan Kernel I get the below. Any ideas?

D:\Downloads\Pixel 4 XL>fastboot boot "D:\Downloads\Pixel 4 XL\Sultan-kernel-floral-R-20210321.zip"
creating boot image...
creating boot image - 17600512 bytes
Sending 'boot.img' (17188 KB) OKAY [ 0.506s]
Booting FAILED (remote: 'Error verifying the received boot.img: Unsupported')
fastboot: error: Command failed

Thank You.
  • Like
Reactions: enskje

Top Liked Posts

  • There are no posts matching your filters.
  • 1
    Been using Android since it began.. I've used alot of good kernels on many devices since Nexus S but I swear after using this for a week along with PD rom on my 4xl, I believe this is most definitely one of my favorites! Appreciate your work here sir! ✌️
  • 24
    * Your warranty is no longer valid, unless you lie.
    * I am not responsible for bricked devices, strained relationships,
    * 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.

    This is a no-frills custom kernel for the Pixel 4 and Pixel 4 XL designed to be used with the stock ROM and custom Android 11 ROMs. It's intended to be a simple replacement for the stock kernel that brings several under-the-hood enhancements. This kernel is not meant to be customized by users.

    Changelogs for each update can be found in the 2nd post of this thread.


    • Compiled with GCC 10.3 from the Arch Linux repository
    • Built with Link Time Optimization (LTO) for improved overall kernel performance
    • Built with Dead Code Elimination (DCE) to shrink the kernel's size by removing unused code
    • Removed lots of excessive bloat (improves security and performance)
    • Simple LMK, a custom low memory killer that improves memory management
    • Optimized CPU frequencies and EAS energy model for improved performance and battery life
    • WireGuard, a next generation secure VPN tunnel
    • Passes SafetyNet bootloader unlock check
    • Improved gaming performance
    • Improved overall system fluidity and graphics performance
    • Improved stability
    • Many other miscellaneous improvements not listed here

    Source code:
    11.0.0-sultan branch: https://github.com/kerneltoast/android_kernel_google_floral

    • zx2c4 (for WireGuard)
    • osm0sis (for AnyKernel3)
    • kdrag0n (for quite a few useful commits)
    • If your name should be here and it isn't, then replace my camera with a OnePlus 3

    Installation instructions:
    You can flash this kernel normally in TWRP, LineageOS recovery, or Franco Kernel Manager.

    Telegram group:

    Latest kernel

    May 6, 2021:
    *Merged May Security Bulletin fixes
    *Improved Simple LMK for better memory management (for example, games are less likely to be killed when multitasking while playing)
    *Further improved scheduler performance for better overall system performance
    *Further improved performance of Unity-based games (such as Genshin Impact)

    Old changelogs:

    April 6, 2021:
    *Merged April Security Bulletin fixes
    *Fixed some apps not working with the previous update

    March 21, 2021:
    *Improved scheduler performance for better overall system performance
    *Improved performance of Unity-based games (such as Genshin Impact)

    March 4, 2021:
    *Re-enabled BPF JIT compiler to improve gaming and overall system performance

    March 1, 2021:
    *Merged March Security Bulletin fixes
    *Fixed a bug where parts of the screen would erroneously remain dim in some apps
    *Improved graphics performance
    *Improved storage access latency
    *Improved touch latency
    *Improved overall system fluidity and power consumption

    February 8, 2021:
    *Added back missing thermal mitigation drivers to fix overheating

    February 6, 2021:
    *Merged February Security Bulletin fixes
    *Further reduced overall system jitter

    January 31, 2021:
    *Fixed a bug in the ashmem rewrite that broke some system-wide sound effects

    January 30, 2021:
    *Added back support for prototype units
    *Fixed a scheduler bug that caused random stutters
    *Improved overall system fluidity
    *Rewrote anonymous shared memory driver (ashmem) for improved graphics performance

    January 16, 2021:
    *Initial release
    neeeeeeeeeeeeeeew buiiiiiiiild
    New build up with improved scheduler performance and gaming performance for Unity-based games.
    Some people who don't have experience with how this works may see all the hotfixes and think "what's going on?" There's something SUPER important to note as a developer myself:

    Hotfix builds = very competent development. Recognizing bugs in your code and fixing them promptly may make it appear that you're making more errors than others - what it really means is you're catching more errors - not making more errors. Lastly - putting stability before ego is something not enough Devs do. A lot of Devs just leave bugs like this until their next planned release.

    Thanks very much for fixing things as they come & keeping us all informed & up to date!