[Bug] Kernel 7.2 series (7.2.2-1) causes boot failure / crash on ASUS TUF / laptops

[sr00t3d]

Pre-flight checklist

• I have searched existing issues and this is not a duplicate.
• I have read the Contributing Guidelines.
• I have verified the issue is reproducible with the latest available CachyOS kernel.
• I have tried to reproduce the issue on Arch Linux's linux kernel.

Upstream / vanilla kernel check

I tested with a vanilla/upstream kernel and the issue does NOT reproduce there (CachyOS-specific bug)

Kernel variant

linux-cachyos (EEVDF, Clang)

System information (cachyos-bugreport.sh)

Very long paste, see here https://paste.cachyos.org/p/e4d82b4.log

Manual system information (if cachyos-bugreport.sh is unavailable)

Bug description

After updating to the recent 7.2 kernel series (linux-cachyos / linux-cachyos-bore 7.2.2-1), the system fails to boot completely, resulting in a system crash/hang during initialization. Reverting back to the stable 7.1.8-1 or the LTS kernel restores normal boot functionality immediately.

Relevant Logs / Symptoms:
During the boot sequence with the 7.2 kernel, multiple ACPI errors and driver interaction failures are logged prior to the crash, heavily pointing towards regressions in ACPI handling and the asus-wmi / backlight subsystems:

ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.I2C1.TPL1], AE_NOT_FOUND
ACPI Error: AE_NOT_FOUND, During name lookup/catalog
asus_wmi: ASUS WMI generic driver loaded
asus_wmi: fan_curve_get_factory_default failed: -19
asus_wmi: using asus-wmi for asus::kbd_backlight

Additionally, udev workers fail to adjust keyboard backlight permissions (Process '/bin/chmod 0666 /sys/class/leds/asus::kbd_backlight/brightness' failed with exit code 1) alongside strict errors with asus_armoury power profiles.

Steps to reproduce

1. Update system with sudo pacman -Syu containing kernel 7.2.2-1.
2. Reboot the system.
3. System hangs/panics during early userspace or initrd initialization.
4. Fallback to 7.1.8-1 or LTS works smoothly.

Expected behavior

The system should boot successfully and stabilize the userspace normally, just as it does on the stable 7.1.8-1 and LTS kernels.

Actual behavior

The system hangs/panics completely during early userspace or initrd initialization when booting the 7.2 kernel series.

Logs / stack traces

ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.I2C1.TPL1], AE_NOT_FOUND
ACPI Error: AE_NOT_FOUND, During name lookup/catalog
asus_wmi: ASUS WMI generic driver loaded
asus_wmi: fan_curve_get_factory_default failed: -19
asus_wmi: using asus-wmi for asus::kbd_backlight
(udev-worker): Process '/bin/chmod 0666 /sys/class/leds/asus::kbd_backlight/brightness' failed with exit code 1.

Additional system information

• OS: CachyOS Linux (x86_64_v3)
• Laptop: ASUS TUF Gaming F16
• CPU: Intel Core i5 HX
• GPU: NVIDIA GeForce RTX (with integrated Intel graphics)
• Bootloader: Limine