Djihed:
(WW) NVIDIA(0): Option "UseDisplayDevice" requested "DFP", but no unused DFPs
The driver was complaining that you don't appear to have any monitors hooked up via DVI to your machine (thus this configuration file appears to be incorrect). Can you back up your /etc/X11/xorg.conf file and try removing the Option "UseDisplayDevice" lines?
Djihed:
(WW) NVIDIA(0): Option "UseDisplayDevice" requested "DFP", but no unused DFPs
The driver was complaining that you don't appear to have any monitors hooked up via DVI to your machine (thus this configuration file appears to be incorrect). Can you back up your /etc/X11/xorg.conf file and try removing the Option "UseDisplayDevice" lines?