This question overlaps with Lenovo ThinkPad X1 Yoga OLED Brightness and Can't control the display brightness on Lenovo X1 yoga OLED, except that these questions' answers reduces the color depth because it's software solution, and not hardware like pulse width modulation used on android phones, which reduces brightness but not color depth.
How can it be done with Ubuntu/Linux?
xrandr --gamma
options in conjunction with thexrandr --brightness
option?0.9:0.9:0.9
and that made it worse then maybe something like1.1:1.1:1.1
will make it better?