As I open to switch often between 1 and 2 screen (I use a laptop), I made a very little bash script based on xrandr to help me switch faster.
.. code:: bash
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#!/bin/bash NB=`xrandr|grep " connected"|wc -l` if [ "$NB" -eq 2 ]; then xrandr --output VGA-0 --auto --left-of LVDS if [ "$1" = "off" ]; then xrandr --output LVDS --off fi else xrandr --auto fi
I named my script dualscreen.
Now, I you just have to run dualscreen in a term (or in a launcher like dmenu or your kde/gnome launcher). Then the script will the detect if 1 or 2 screen are plugged and do what it need to do.
If you want to plug a second screen and switch off the screen of the laptop, you can run dualscreen off and there you go !
Of course you need to adapt the output name depending on your hardware. Just run randr in a terminal.
For example, here is what I have running xrandr:
.. code:: bash
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384 LVDS connected 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1366x768 60.2*+ 1280x720 59.9 1152x768 59.8 1024x768 59.9 800x600 59.9 848x480 59.7 720x480 59.7 640x480 59.4 DisplayPort-0 disconnected (normal left inverted right x axis y axis) HDMI-0 disconnected (normal left inverted right x axis y axis) VGA-0 disconnected (normal left inverted right x axis y axis)
This means that I have 4 outputs. The LVDS is my laptop output. Then, plug your screen and run the xrandr command again. You'll see another output connected. This is the one you should use in the script.
If you are lucky enough that your computer send an acpi signal or something to detect that a screen is plugged, you can do it automatically.
Unfortunatly it's not the case with my current laptop so I don't know more ^^. Maybe someone can send me an email with the procedure :).