3 examples for xrandr

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  # change resolution of display eDP1 to fullHD
xrandr --output eDP1 --mode 1920x1080
  Submitted by anonymous user over 10 years ago [permalink]
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  # Restore your previous resolution
xrandr -s 0
  Submitted by anonymous user about 10 years ago [permalink]
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  # Change screen (eDP1) gamma level to simulate brightness (backlight) modification. Useful when backlight doesn't work.
xrandr --output eDP1 --brightness .3
  Submitted by anonymous user about 10 years ago [permalink]