Xrandr
XRandR
--query -> details about grapics adapter
--output LVDS|LCD|VGA|HDMI --mode 800x600 -> change resolution
--output LVDS|LCD|VGA|HDMI --auto -> restore resolution
--output LVDS|LCD|VGA|HDMI --rate 60
connecting a projector
clone VGA and LVDS outputs:
xrandr --output VGA --mode 1024x768 --same-as LVDS --output LVDS --mode 1024x768
switch off projector:
xrandr --output VGA --off
xrandr --output LVDS --auto
switch off internal display and use external display:
xrandr --output LVDS --off --output VGA --auto
multi-head
xrandr --output LVDS --auto --left-of VGA --output VGA --auto
rotation
xrandr --output LVDS --rotate left|right|normal|invert
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