keyboard backlight does not work after suspend

[androidnisse]

Please confirm there isn't an existing open bug report

• I have searched open bugs for this issue

Summary

When I boot my laptop the keyboard backlight works as expected. When I close the lid and then later wakes it the backlight is off and can't be turned on. The only way I have found to fix this is to restart the laptop.

Steps to reproduce

1. Close the lid.
2. Open the lid.

Expected result

Light is still on.

Actual result

Light is turned off and can't be turned off.

Environment

• Is system up to date?

Repo

Shannon (stable)

Desktop Environment

Budgie

System details

System:
  Host: vesslan Kernel: 6.11.7-308.current arch: x86_64 bits: 64
  Desktop: Budgie v: 10.9.2 Distro: Solus 4.6 convergence
Machine:
  Type: Laptop System: Dell product: Latitude 5420 v: N/A
    serial: <superuser required>
  Mobo: Dell model: 047J2X v: A01 serial: <superuser required> UEFI: Dell
    v: 1.40.0 date: 08/13/2024
Battery:
  ID-1: BAT0 charge: 29.7 Wh (90.0%) condition: 33.0/63.0 Wh (52.4%)
CPU:
  Info: quad core 11th Gen Intel Core i5-1135G7 [MT MCP] speed (MHz): avg: 400
    min/max: 400/4200
Graphics:
  Device-1: Intel TigerLake-LP GT2 [Iris Xe Graphics] driver: i915 v: kernel
  Device-2: Sunplus Innovation Integrated_Webcam_HD driver: uvcvideo
    type: USB
  Display: x11 server: X.Org v: 21.1.14 with: Xwayland v: 24.1.4 driver:
    gpu: i915 resolution: 1920x1080~60Hz
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 24.2.6
    renderer: Mesa Intel Xe Graphics (TGL GT2)
Network:
  Device-1: Intel Wi-Fi 6 AX201 driver: iwlwifi
  Device-2: Intel Ethernet I219-V driver: e1000e
Drives:
  Local Storage: total: 238.47 GiB used: 168.51 GiB (70.7%)
Info:
  Memory: total: 16 GiB note: est. available: 15.2 GiB used: 3.64 GiB (23.9%)
  Processes: 384 Uptime: 3m Shell: Zsh inxi: 3.3.36

Other comments

Works fine with the LTS kernel.

[TraceyC77]

This may be an upstream issue with Budgie and power management. @EbonJaeger , any thoughts?

[EbonJaeger]

Nothing in the Budgie project interacts with keyboard backlights. I would suspect something with UPower or the Kernel.

[androidnisse]

I have a Dell so this fits. Is this something I can test on Solus as well?

[TraceyC77]

Fixed the labels since this isn't Budgie related, but kernel / UPower related

I just realized I have the same issue on my Dell XPS 17.
Reading over the workaround you linked, that should work on Solus (or any systemd based OS really). Let us know if it works on your system.

[androidnisse]

I tried the Arch file like this but after sleep it still does not work. Is there any way to see if the service is loaded or so?

[malfisya]

Try either of these:

systemd-analyze blame | grep keyboard-brightness
systemctl status keyboard-brightness    

[androidnisse]

Try either of these:

systemd-analyze blame | grep keyboard-brightness
systemctl status keyboard-brightness    

Thank you, I have checked and it is not loaded. The first one gives nothing and the other gives this:
Unit keyboard-brightness.service could not be found.

I have added the file in this path:
/home/jakob/.config/systemd/system