When I start nvidia-settings, it says that both of my displays are disabled. Except that I'm typing this using display 0. When I try to enable display 0, it says 'Separate X Screen (Requires X Restart)'. I save the configuration to xorg.conf and restart the X server. Then I'm back to having two disabled displays. I've run out of ideas, so does anyone have some words of wisdom to offer?
Kubuntu 12.04 Linux bender 3.2.0-37-generic #58-Ubuntu SMP Thu Jan 24 15:28:10 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Monitors: Viewsonic VP201s (DFP-0 on GPU-0) 1600x1200 Mitsubishi MEUSPTV8 (DFP-1 on GPU-0) 1920x1080
Video card: Nvidia GeForce 7900 GS
Packages: nvidia-173-updates: 173.14.36 nvidia-common: 1:0.2.44.2 nvidia-settings: 295.33
xserver info: version number: 11.0 vendor string: The X.Org Foundation vendor release number: 11103000 X.Org version: 1.11.3