Cannot adjust brightness via keyboard after suspending without a display manager
from monovergent@lemmy.ml to linux@lemmy.ml on 11 Nov 17:11
https://lemmy.ml/post/22389097

Decided to uninstall my display manager and use startx instead. But now when I resume from suspend, the brightness keys cease to work until I log out and back in. Backlight does still respond when echoing into /sys/class/backlight/intel_backlight/brightness. But what kind of magic does a display manager do to keep brightness controls working after suspend and resume?

Using xfce on tty1 on an X230 if it matters.

#linux

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eldavi@lemmy.ml on 11 Nov 17:36 next collapse

i think that most of them either use something like xrandr or brightnessctl.

HexagonSun@sh.itjust.works on 14 Nov 06:36 collapse

My 2012 MacBook Pro has exactly the opposite behaviour on a clean install across multiple distros. The brightness keys do nothing until after a suspend, then work fine until the next reboot. Never found a fix.