How to Change the Brightness of LCD Display from the Command Line in Ubuntu
How to use the Ubuntu CLI to change the brightness of LCD displays.
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Open your terminal and type this:
$ xrandr -q | grep "connected"
If you have multiple monitors, you will have output as:
VGA1 connected primary 1280x1024+1920+0 (normal left inverted right x axis y axis) 338mm x 270mm HDMI1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
Here, VGA1 and HDMI1 are your display. If you want to change the brightness of ‘VGA1’ type the following:
$ xrandr --output LVDS1 --brightness 0.9
The brightness ranges from 0.0 to 1.0 and 1.0 means full black.
Published at DZone with permission of A. N. M. Bazlur Rahman, DZone MVB. See the original article here.
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