I just installed Backtrack 5 R3 Gnome 32bit on my other computer but it only takes up approximately 1/4 of the screen(the rest is black).

If I go to System->Preferences->Monitor it says "Monitor unknown".

So what could this be? Is this a common issue?
Could I just reconfigure X or do I need new drivers?


Unfortuneately the computer is not available now so I can't post specs.