I have been using the on board video and decided to try using old nvidia 8800 gts with no luck. Unable to get display working. It shows either blocks on screen or line streaks acoss the screen once it reaches ubuntu login.
ubuntu 12.04.1 LTS00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation G92 [GeForce 8800 GTS 512] (rev a2)
I also went to system settings and tried additional drivers but nothing is listed.
In order to get back to post this, I had to go into BIOS and set iGPU as initial.
Anything else I can try?