Can't change brightness in Kubuntu 18.04

Question

I can't change the brightness in Kubuntu 18.04. I tried to do it with the keyboard shortcuts (Fn + ←/→) and in the Battery and brightness section in the Task Manager.

Please [edit] your question and add the output of sudo lshw -C display and ls -l /usr/share/X11/xorg.conf.d/ — Raffa, Apr 17 '20 at 18:37
Does this answer your question? 18.04 can't adjust screen brightness on Lenovo Thinkpad T510 — Raffa, Apr 17 '20 at 18:52

score 1 · Accepted Answer · answered Apr 17 '20 at 18:37

1

As just a simply workaround you can use the following command-line to set your brightness:

echo 255 | sudo tee /sys/class/backlight/*/brightness >/dev/null

Change the 255 value with one from 0 to 255 to move from min to max value.

answered Apr 17 '20 at 18:37

maxwatt

488

1

So i suppose there is no easier way to do that, right? – Francesco 'oH pongwIj'e' Apr 17 '20 at 18:45
I suppose you have some trouble with the display configuration, so to solve the issue from the root, you have to found the original problem. – maxwatt Apr 17 '20 at 20:00

Can't change brightness in Kubuntu 18.04

1 Answers1