[arch-general] How to remove secondary display shown in Gnome 3 settings

[Guus Snijders]

Op 22 apr. 2016 22:14 schreef "Francis Gerund" <ranrund at gmail.com>:
>
> Hello.
>
> While trying to fix what I thought was an application program window
> placement problem, it turns out that the problem was that Gnome 3 seems to
> be detecting a display which does not seem to exist.
>
> Clicking the Gnome "Settings" icon, then the "Displays" icon seems to show
> both a primary and a secondary display.
> But there is only one monitor and one graphics card!
[...]

Not a complete answer, but you could try toying with xrandr[1].  I wonder
if it's some spooky hardware fault or some software (vnc, nx, etc) that
"creates" the 2nd monitor.

1 https://wiki.archlinux.org/index.php/xrandr

Mvg, Guus Snijders