Arch Linux

mhersaribekyan

Member

Registered: 2024-11-29

Posts: 2

Asus Zenbook 14 hardware functionality missing after kernel update

After updating to the latest version of the kernel, the keyboard backlight control stopped working. The backlight is set to full brightness after boot, and turns off until next reboot when I suspend.

$ ls /sys/class/leds
input31::capslock  input31::kana     input31::scrolllock  input3::numlock
input31::compose   input31::numlock  input3::capslock     input3::scrolllock

The battery charge limit was defined in /sys/class/power_supply/BATT/charge_control_end_threshold, however after the update that file is gone.

$ ls /sys/class/power_supply/BATT/
alarm               charge_now   manufacturer   status      voltage_min_design
capacity            current_now  model_name     subsystem   voltage_now
capacity_level      cycle_count  power          technology
charge_full         device       present        type
charge_full_design  hwmon2       serial_number  uevent

Laptop model: Zenbook 14 UM3402YA.
Kernel: 6.12.1-arch1-1

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,447

Re: Asus Zenbook 14 hardware functionality missing after kernel update

Likely related to: https://bbs.archlinux.org/viewtopic.php?id=301341

mhersaribekyan

Member

Registered: 2024-11-29

Posts: 2

Re: Asus Zenbook 14 hardware functionality missing after kernel update

Yep, it was the linux-6.12.1.arch1-1 kernel that caused the problem. I fixed it by downgrading to an older kernel.

I downloaded the linux and linux-headers and downgraded with pacman.

$ curl -o -o https://archive.archlinux.org/repos/202 … kg.tar.zst https://archive.archlinux.org/repos/202 … kg.tar.zst
$ sudo pacman -U linux-6.11.6.arch1-1-x86_64.pkg.tar.zst linux-headers-6.11.6.arch1-1-x86_64.pkg.tar.zst

Until they fix it in a future update, I am going to be stuck with this kernel version.