$xrandr | grep connected VGA-0 connected 1024×768+0+0 (normal left inverted right x axis y axis) 340mm x 270mm $xrandr –output VGA-0 –brightness 1 $xrandr –output VGA-0 –brightness 0.5 $ Theory Drop The X Resize, Rotate and Reflect Extension (RandR)[2] is an X Window System extension, which allows clients to dynamically change X screens, so as …
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