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
xrandr --output VGA1 --off
- Set the brightness for LVDS1 to 50%:
xrandr --output LVDS1 --brightness 0.5
- Display the current state of any X server:
xrandr --display :0 --query