I have this problem, if I try and activate Nvidia drivers (using the additional drivers tool) it freezes my computer. What I mean by freezes is... if I turn on the computer, I'm able to use it for about 45 seconds until nothing works besides the mouse; the mouse will still move around but not anything else. I've tried, Nvidia current, Experimental 304, and experimental 310, all do the same thing.
I tried this: My computer freezes when nvidia drivers activated
sudo apt-get install nvidia-current=295.49-0ubuntu1~precise~xup1
comes out with this error:
Version '295.49-0ubuntu1~precise~xup1' for 'nvidia-current' was not found
I'm on an apple computer, dualbooting ubuntu 12.04 and osx.
If there's anything else I need to tell you, please let me know. :D