Hi! Not sure if this is possible but I'd like to dim my external display's backlight. Unfortunately this gives:
$ xbacklight No outputs have backlight property One can do "xrandr --output DP2 --brightness 0.5", but this only makes the colors less bright (as opposed to dimming the backlight). Any ideas? Thanks! Clementine $ xrandr Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 32767 x 32767 DP1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP2 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 553mm x 311mm 2560x1440 59.95*+ 2048x1152 60.00 1920x1200 59.88 1920x1080 50.00 30.00 1600x1200 60.00 1680x1050 59.95 1280x1024 75.02 60.02 1200x960 59.99 1152x864 75.00 1280x720 50.00 1024x768 75.08 60.00 800x600 75.00 60.32 720x576 50.00 720x480 59.94 640x480 75.00 60.00 59.94 720x400 70.08 HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis)
