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xrandr

 
Set the size, orientation and/or reflection of the outputs for a screen. More information: https://www.x.org/releases/current/doc/man/man1/xrandr.1.xhtml.
 
  • Display the current state of the system (known screens, resolutions, ...):
     
    xrandr --query
     
  • Disable disconnected outputs and enable connected ones with default settings:
     
    xrandr --auto
     
  • Change the resolution and update frequency of DisplayPort 1 to 1920x1080, 60Hz:
     
    xrandr --output {{DP1}} --mode {{1920x1080}} --rate {{60}}
     
  • Set the resolution of HDMI2 to 1280x1024 and put it on the right of DP1:
     
    xrandr --output {{HDMI2}} --mode {{1280x1024}} --right-of {{DP1}}
     
  • Disable the VGA1 output:
     
    xrandr --output {{VGA1}} --off
     
  • Set the brightness for LVDS1 to 50%:
     
    xrandr --output {{LVDS1}} --brightness {{0.5}}

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