The POCO F3 (Alioth) custom development community has received a major kernel update with the release of E404 Kernel vR15. Developed by sk113r, this stable release introduces a new kernel base, upstream Linux improvements, updated RKSU support, better charging reliability, and several backported features from newer Linux kernel versions.
Designed to support a wide range of Android versions—from Android 11 through Android 16 QPR2—E404 Kernel is compatible with AOSP, MIUI, HyperOS, and selected Oplus port ROMs, making it one of the most versatile custom kernels available for the POCO F3.
E404 Kernel vR15 Information
- Kernel Name: E404 Kernel vR15
- Device: POCO F3 (Alioth)
- Kernel Type: Stable Custom Kernel
- Supported Android Versions: Android 11 to Android 16 QPR2
- Developer: sk113r
- Updated: 16 May 2026
What’s New in E404 Kernel vR15?
New Kernel Source
One of the biggest changes in vR15 is the migration to a new kernel source, providing a cleaner and more modern foundation for future development. The kernel has also been rebased to improve compatibility and long-term maintainability.
RKSU Updated
The kernel updates RKSU to v3.2.2-legacy (32473), improving compatibility with modern kernel-based root implementations while incorporating upstream improvements.
Mi Pad 6 Support
Support has been added for Pipa (Mi Pad 6), expanding compatibility beyond the POCO F3 and allowing the kernel source to support additional Snapdragon 870-based devices.
NTsync Backport
E404 Kernel imports NTsync from Linux 6.14.
NTsync is designed to improve synchronization performance used by Windows compatibility layers, which can help deliver better performance for certain emulators and compatibility tools that rely on Wine or similar technologies.
Scheduler Improvements
The scheduler has received multiple backports from the Linux mainline kernel, improving task scheduling efficiency, CPU resource allocation, and overall system responsiveness.
ZRAM Improvements
Updated ZRAM components improve compressed memory handling, which can enhance multitasking performance while reducing memory pressure under heavy workloads.
RCU Backports
The kernel includes newer Read-Copy-Update (RCU) improvements from the Linux mainline, helping improve synchronization efficiency and kernel stability.
epoll_pwait2 Backport
Support for epoll_pwait2 has been backported to improve compatibility with Android 16, allowing better support for newer userspace components.
Updated pstore
The pstore subsystem has been reworked and backported from Linux 5.4, improving crash log collection and system diagnostics.
Improved Charging Policy
Charging behavior has been refined to provide greater reliability during charging while helping improve overall battery management.
Stability Improvements
In addition to the major feature updates, numerous internal improvements have been made throughout the kernel source to improve stability, compatibility, and long-term reliability.
ROM Compatibility
E404 Kernel supports a wide variety of ROMs, including:
- AOSP Android 11–16
- MIUI Android 11–15
- HyperOS
- Android 16 QPR1
- Android 16 QPR2
- Dandaa’s Oplus Port ROMs
This broad compatibility makes the kernel suitable for users who frequently switch between different ROMs.
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 backports
- RCU backports
- Backported epoll_pwait2
- Reworked pstore from Linux 5.4
- Improved charging policy
- General kernel optimizations
- Stability improvements
Installation Notes
The developer recommends:
- Carefully read the installation guide before flashing.
- Ensure the kernel matches your installed ROM.
- Use the recommended KernelSU Manager for managing root functionality.
- Review the NTsync documentation if you want to understand its emulator-related performance improvements.
Important Links:
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 project:
- sk113r – Kernel developer.
- EmanuelCN0
- Community contributors and donors.
- All testers and community members who helped validate the release.
Final Thoughts
E404 Kernel vR15 is one of the most comprehensive kernel updates available for the POCO F3, combining extensive Linux backports with improved Android compatibility and support for multiple ROM ecosystems. The migration to a new kernel source, Linux mainline scheduler improvements, updated RKSU, NTsync integration, and charging enhancements demonstrate a strong focus on both performance and long-term stability.
Whether you’re running AOSP, HyperOS, MIUI, or compatible Oplus ports, E404 Kernel provides a solid foundation for users seeking improved responsiveness, modern kernel features, and broad Android version compatibility. As always, verify ROM compatibility, read the installation guide carefully, and create a complete backup before flashing any custom kernel.
