The POCO F3 (Alioth) custom development community welcomes the release of E404 Kernel vR15, a major stable update developed by sk113r. Designed to support a wide range of Android versions, this kernel introduces a rebased kernel source, multiple Linux mainline backports, improved charging behavior, updated root support, and enhanced compatibility with Android 16.
Supporting Android 11 through Android 16 QPR2, E404 Kernel is compatible with AOSP, MIUI, HyperOS, and selected Oplus-based ports, making it one of the most versatile custom kernels available for Snapdragon 870 devices.
E404 Kernel vR15 Information
- Kernel Name: E404 Kernel vR15
- Device: POCO F3 (Alioth)
- Kernel Type: Stable Custom Linux Kernel
- Supported Android Versions: Android 11 to Android 16 QPR2
- Supported ROMs: AOSP, MIUI, HyperOS, and selected Oplus ports
- Developer: sk113r
- Updated: 16 May 2026
What’s New in E404 Kernel vR15?
New Kernel Source
The kernel has been moved to a new rebased source, providing a cleaner codebase and a stronger foundation for future updates. Rebasing also improves long-term maintainability and compatibility with newer Android releases.
RKSU Updated to v3.2.2
E404 Kernel now includes RKSU v3.2.2-legacy (32473), bringing updated kernel-based root functionality with improved compatibility and reliability.
Mi Pad 6 (Pipa) Support
Support has been added for the Mi Pad 6 (Pipa), allowing the same kernel project to support multiple Snapdragon 870-powered Xiaomi devices.
NTsync from Linux 6.14
The kernel imports NTsync from Linux 6.14, a modern synchronization subsystem that can significantly improve the performance of Windows compatibility layers and certain emulators that rely on Wine or Proton-style synchronization.
Linux Mainline Backports
Several important components have been backported from newer Linux kernel versions, including:
- Scheduler improvements
- ZRAM enhancements
- RCU (Read-Copy-Update) optimizations
These updates contribute to smoother multitasking, better memory management, and improved overall responsiveness.
epoll_pwait2 Backport
Support for epoll_pwait2 has been backported to improve compatibility with Android 16 and newer userspace components.
Updated pstore
The pstore subsystem has been reworked and backported from Linux 5.4, improving kernel crash logging and system diagnostics.
Improved Charging Policy
Charging management has been refined to improve charging reliability while helping maintain more stable battery behavior during everyday use.
General Stability Improvements
Numerous low-level optimizations have been implemented throughout the kernel, improving code quality, reliability, and long-term stability.
Supported ROMs
E404 Kernel supports a broad range of Android ROMs, including:
- AOSP Android 11–16
- MIUI Android 11–15
- HyperOS
- Android 16 QPR1
- Android 16 QPR2
- Dandaa’s Oplus Port ROMs
This wide compatibility allows users to continue using the same kernel across multiple ROMs without needing separate releases.
Official Changelog
- Moved to a new kernel source
- Rebased kernel source
- Updated RKSU to v3.2.2-legacy
- Added Mi Pad 6 (Pipa) support
- Imported NTsync from Linux 6.14
- Scheduler backports from Linux Mainline
- ZRAM improvements
- RCU backports
- Backported epoll_pwait2
- Reworked pstore from Linux 5.4
- Improved charging policy
- General kernel optimizations
- Enhanced overall stability
Installation Notes
Before flashing E404 Kernel, the developer recommends:
- Carefully read the installation guide before proceeding.
- Ensure your installed ROM is supported.
- Use the recommended KernelSU Manager for managing root access.
- Review the NTsync documentation if you plan to use emulators that can benefit from the new synchronization improvements.
Important Links:
Kernel Releases:
https://github.com/kvsnr113/e404_kernel_releases/releases
Kernel Source:
https://github.com/kvsnr113/xiaomi_sm8250_kernel
Kernel Installation Guide:
https://t.me/Projkt113Dumps/709?single
Support Group:
https://t.me/Projkt113Disc
Contributors
Special thanks to everyone who contributed to the development of E404 Kernel:
- sk113r – Lead developer
- EmanuelCN0
- Community contributors and donors
- All testers and project members who helped validate the release
Final Thoughts
E404 Kernel vR15 is a substantial update that brings modern Linux kernel improvements to the POCO F3 while maintaining compatibility across multiple Android versions and ROM ecosystems. The migration to a new kernel source, updated RKSU implementation, Linux 6.14 NTsync integration, scheduler and memory management backports, and charging improvements demonstrate a strong focus on both performance and long-term reliability.
Whether you’re running AOSP, HyperOS, MIUI, or a supported Oplus-based ROM, E404 Kernel provides a stable and feature-rich foundation for everyday use. As always, verify compatibility with your ROM, follow the installation guide carefully, and create a full backup before flashing any custom kernel.
