Hot answers tagged display
This problem (AFAIK) is not Ubuntu's fault. It is the graphics card itself. What I believe is happening is that the graphics card is creating a "ghost" monitor. It's (usually) disabled unless it's needed by the computer. This allows the system to use the monitor without having to reboot. A potential patch for this is to simply disable the extra monitor, ...
This sounds like a known, on-going bug with Xserver for Ubuntu 13.10 and 14.04. Here's a couple links with workarounds and a bug thread for NVidia cards: Unknown display besides laptop Built-in display Ubuntu detects a non-existing screen Not sure if you tried to upgrade your Xserver or what HWE you're using but you may want to try that. More info on your ...
You can specify DISPLAY environment to specify display for launching apps (see Graphical Environment) as follows from tty: DISPLAY=:0 <app-command> Example: DISPLAY=:0 gedit DISPLAY=:0 gnome-terminal This will launch GUI applications in GUI mode (Ctrl+Alt+F7) from tty (Ctrl+Alt+F1).
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