Problem: installed ubuntu 12.04 i have 4 screens, only 1 works, the other 3 screens are white and the mouse is an X, it does not show them in displays, it just shows 1 screen, but when i go to nvidia settings u can see all 4. how do i fix this.

Computer:

Running 4 Monitors

Case: Corsair Obsidian 800D

Motherboard: Gigabyte x79-UP4 LGA 2011 Socket

Mobo Additionals: Gigabyte pci-e 802.11 b/g/n + bluetooth

CPU: Intel I7-3930k 3.2 GHZ 12MB LGA 2011 Not Overclocked

GFX: Nvidia MSI 2GB GTX 680

Memory: Corsair Vengeance 2133MHz 16GB

Rom Drive: LG 12x Blue-ray player and DVDRW Combo Drive

Thermal Display: NZXT sentry lx aluminum dual bay digital fan control

Cooling: Corsair hydro series h60 120mm liquid cooling

SSD:128gb sandisk sata iii 6.0gb/s SSD <---where Ubuntu was installed

Data Drive: 2tb sata iii 6gb/s 7200rpm 64mb cache 3.5" hd

Media Reader: 12-in-one internal card reader

Power Supply:Coolermaster silent pro gold 1000w power supply