For presentations I want to use the external USB connected video adapter connected to the projector (especially as the standard VGA output in my laptop got damaged).
My idea was to start a dedicated X server on this additional video adapter, and make it available via VNC. Then I can connect to it with xvncviewer to manage the presentation from my main X session (and have additional applications open, which are not visible for the audience).
Hover the problem is, that if I start the X server in this additional video adapter, it uses certain virtual console. As soon as I switch the virtual console to return to my main X session (to access the presentation X server via VNC), the presentation X server stops refreshing (as it sees, that its virtual console is not active).
Is there any way to start the additional X server in such a way, that it keeps refreshing, when I'm working in my main X session?