(EE) NVIDIA(0): Failed to initialize the NVIDIA graphics device!
(EE) NVIDIA(0): *** Aborting ***
(II) UnloadModule: "nvidia"
Here is your problem, not the lack of screens (or configuration). Verify that you can manually insert the nvidia kernel module into the kernel using this command:
If this fails you will get a message explaining it as well as output into /var/log/messages (there will be a harmless message about 'tainting' the kernel, ignore this one). Verify afterward that the module is loaded with: lsmod
Once the module is loaded try X again.