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Today I discovered brightnessctl to adjust the screen brightness on my
AwesomeWM machine. Its a command line utility that you can use to adjust the
brightness of your screen. A command line interface like this gives you the
ability to bind keys with something like xbindkeys or your window manager
configuration.
sudo apt install brightnessctl # or paru -S brightnessctl
Now that you have it installed you can use it to adjust the brightness of your screen, this worked particularly well for my laptop screen, I don't think this works for monitors, in my experience they are usually controlled by the built in osd.
# Increase brightness by 10% brightnessctl set +10% # Decrease brightness by 10% brightnessctl set 10%- # Set brightness to 50% brightnessctl set 50% # Set brightness to 100% brightnessctl set 100%
Note
on my machine I had to use sudo to run the command, otherwise I got the following error:
Can't modify brightness: Permission denied You should run this program with root privileges. Alternatively, get write permissions for device files.