(Above answer is more helpful :D)
It is quite common for attached external monitors to not have bound brightness controls in the same way laptops do. To adjust brightness of the external monitors I ...
You should check wether your current graphics card drivers are up-to-date. Moreover, disabling such drivers can help to see if the issue is fixed. If using the intel-based graphics card, you can use ...
I can't change the display brightness via FN-Hotkey either. It work's on the energycontrol-settings.
What's the downside of the nuveau-driver for laptops?
I do have another problem, probably related ...
Use a bash script!
My script based on kagronick's one is super easy to use, just set a number from 0 to 100:
chmod +x light
This sets brightness to 50%
Find it here:
There are two solutions that come to my mind:
First one is to use the old kernel. On boot you need to open Grub >> Advanced options. There you can find the older versions.
Second solution is using "...