My laptop adds/enables a VGA monitor called vga2 that doesn't actually exist every time I reboot, which fiddles with the mouse speed amongst other annoyances. What can I do to either stop it being enabled or automatically disable it on boot?
You can use the following command:
xrandr --auto
If this doesn't disable your non-existent VGA, then use the following method:
First run:
xrandr --current
to get the right name of your VGA. This can be VGA, VGA-0, VGA1, VGA2 and others.
If the name of your VGA is, for example VGA2 (as you said), then run:
xrandr --auto && xrandr --output VGA2 --off
This should disable the output of VGA2.
See man xrandr for more info.
Then, if you get it to work, put the right command in a small script, make it executable and put it to run on start up.
