I have to setup an X server on a linux station that can export its display (the whole session + gnome) to an external display which has a huge resolution (it's a wall of screens). The resolution is about 9000x4000.
Naturally, the video card on the server doesn't support this. I was thinking of creating a secondary X server with a custom/dummy video card that is used only to export X through XDMCP and render the output on the remote X server which runs on the display controller (and supports this resolution).
My question is - how do I setup this "dummy" X server? Is the max resolution provided by the video card a limit for the resolution of the server?
I remember in the old days one could setup a virtual resolution for the X server of let's say 1024x768 and a real resolution of 800x600 and the screen would automatically pan to fit the 800x600 resolution. I'm hoping I can use the same trick this time, but I need a push in the right direction.