*** Update: To persist this change between machine restarts, see this post ***
1) Save this script as monitor-switcher.sh:
#!/bin/bash # Author: Andrew Martin # Credit: http://ubuntuforums.org/showthread.php?t=1309247 echo "Enter the primary display from the following:" # prompt for the display xrandr --prop | grep "[^dis]connected" | cut --delimiter=" " -f1 # query connected monitors read choice # read the users's choice of monitor xrandr --output $choice --primary # set the primary monitor
2) Make executable with:
chmod +x monitor-switcher.sh
All credit to the article here.