Re: xrandr: Failed to get size of gamma for output default

oting here in case they're related. $ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected 1920x1080+0+0 0mm x 0mm 1920x1080 0.00* $ xbacklight -set 50 No outputs have backlight pro

xrandr: Failed to get size of gamma for output default

$ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected 1920x1080+0+0 0mm x 0mm 1920x1080 0.00* $ xbacklight -set 50 No outputs have backlight property Any thoughts or suggestions? Cheers