i installed manjaro (kde / gnome) 20.2 , but screen brightness on my laptop ( intel/nvidia 1050 graphic card ) does not work. i can not increase or decrease that and that is invariable.
thanks for any help
See if you can provide some more information based on this instructions
After that will be much easier to someone to point you in the right direction.
if kernel is 5.9.x try
i915.enable_dpcd_backlight=0 as boot parameter
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