[Trisquel-users] HOw to darken/turn off only one screen

Mason Hock mason at masonhock.com
Wed Feb 20 02:04:13 CET 2019

If that doesn't work, you could just use xrandr to turn the screen on or

First, run

$ xrandr | grep primary

to find out the name of your laptop screen. (I'm assuming that your
laptop screen is your primary display.) For me the output is

$ xrandr | grep primary
LVDS1 connected primary 1280x800+0+0 (normal left inverted right x axis y axis) 261mm x 163mm

so the name of my laptop screen is LVDS1.

I can then turn it off with

$ xrandr --output LVDS1 --off

and on with

$ xrandr --output LVDS1 --auto

Then map these to convenient keyboard shortcuts.
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