How to change brightness of LCD want image look deemed and soft the
xrandr --output LVDS1 --gamma 0.8:0.8:1.1
change only gamma but not the brightness of image. I have no option --brightness for xrandr
I don't know if there is a universal standard for manipulating LCD brightness; if not this will become a matter of hardware drivers, etc.
Which I suspect it is; trying
Guess I am stuck using the gimpy buttons on the panel. ;)