I have 3 screens, 1920x1080 each, vertical. Two on one GPU (GTX 470, Screen 0), and One on another GPU (GTX 465, Screen 1).
I would like to *disable* Xinerama info so that applications are reported that there is just one, large, 5760x1080 screen. Is there a way to do this? Specifying --no-twinview-xinerama-info using nvidia-xconfig reports one 3840x1080 screen and one 1920x1080 screen, but I would like to disable all Xinerama information coming from the X server so that applications think they're running on one big monitor.