xrandr: add page

pages/linux/xrandr.md

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+# xrandr
+
+> Set the size, orientation and/or reflection of the outputs for a screen
+
+- 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`