Score:1

Can't adjust screen brightness in settings or with Fn keys

mp flag

I am using Ubuntu Unity on a Lenovo Ideapad Flex 5 (14ARE05). When I go to the 'Brightness and Lock' settings there are only options to adjust lock, not the brightness. How do I fix this? I already tried the Fn keys, but they don't work.

Example

Edit: I don't know if it is related to this particular problem, but as background, I am experiencing other issues, like PrtSc key not working, wallpaper missing, etc. I did run echo "c" > /proc/sysrq-trigger as a joke to trigger a kernel panic. It seems to modify the PrtSc/SysEq behavior, possibly creating these issues?

in flag
The screen brightness issue has been a long-standing problem with Ideapads. Unfortunately it has only one setting, as Lenovo has not yet made Linux drivers for the panel light
I sit in a Tesla and translated this thread with Ai:

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