amdgpu-backlight

Recently acquired a new laptop with an AMD Ryzen 5 PRO 3500U processor that provides an AMD Radeon RX Vega 8. Long story short, there’s a bug that prevents from setting xbacklight values… but it’s still possible to echo values from 0 to 255 to the amdgpu_bl0 brightness file, so this script was born.

Remember, this software is provided AS IS. Run at your own risk

help

usage: amdgpu-backlight [-h] [-s] [-q] [--confirm] [percent]
A duct-tape solution to a very annoying bug.
positional arguments:
  percent      Set brightness to this percentage.
optional arguments:
  -h, --help   show this help message and exit
  -s, --step   Increase/Decrease brightness by a step instead.
  -q, --query  Get current brightness percentage.
  --confirm    This software is provided AS IS. Please, confirm that you're completely sure that you want to run this script. This argument is required.

i3

There’s also a companion script for i3status: i3status-amdgpu-backlight, which you can use like so:

bar {
        status_command i3status | /path/to/bin/i3status-amdgpu-backlight
        ...
}

sudoers.d

You might want to create a file named /etc/sudoers.d/amdgpu-backlight with this content:

YOU ALL = (ALL:ALL) NOPASSWD: /usr/bin/amdgpu-backlight

Bugs?

If you find one, report it please.

License

see LICENSE