LenovoLegionLinux Kernel 7.0 Fix (CachyOS)

⚠️ This is a temporary patch for ONE specific device only!

• Laptop: Lenovo Legion 5 15ACH6H (Model 82JU)
• BIOS: GKCN65WW
• Kernel module built for: 7.0.3-1-cachyos
• Will NOT work on other Legion models - different BIOS/ACPI IDs
• For other devices: Wait for original maintainer (johnfanv2) to add Kernel 7.0 support

Quick Install

tar -xzf LenovoLegionLinux-kernel7-fix.tar.gz
cd LenovoLegionLinux-kernel7-fix
sudo ./install.sh

What This Fixes

Issue	Fix
Driver won't load on Kernel 7.0	Changed ACPI device ID (PNP0C09 → VPC2004)
Rapid charging not working	Added QCHO ACPI method fallback
Build fails on CachyOS	Auto-detect Clang toolchain

Tested Features

• ✅ Rapid Charging
• ✅ Battery Conservation (Fn+R)
• ✅ Touchpad Toggle (Fn+Q)
• ✅ Fan Speed / Temperature
• ✅ Power Modes
• ✅ Platform Profile
• ✅ Fan Curve
• ✅ Keyboard LED
• ✅ Y-Logo LED

Kernel Updates

When kernel updates (e.g., 7.0.0 → 7.0.1), rebuild manually:

sudo pacman -S clang make linux-headers
cd /path/to/LenovoLegionLinux-kernel7-fix
make -C kernel_module KVERSION=$(uname -r) CC=clang modules
sudo cp kernel_module/legion_laptop.ko /lib/modules/$(uname -r)/kernel/drivers/platform/x86/
sudo depmod -a
sudo modprobe -r legion_laptop
sudo modprobe legion_laptop force=1

Uninstall

sudo ./uninstall.sh

Credits

• Original driver: johnfanv2/LenovoLegionLinux
• Patch by: v4cachy