xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1368 x 768, maximum 1368 x 768
default connected 1368x768+0+0 0mm x 0mm
   1366x768        0.0
   1024x768        0.0
   800x600        61.0
   1368x768        0.0*