I also have this problem. My solution is to install old nvidia drivers. This sound stupid, but it's a solution.
I used Envy (http://albertomilone.com/) to install old drivers (96.43.01). Now system works great. Now I turned on powernowd, compiz. Firefox also works great.
I also have this problem. My solution is to install old nvidia drivers. This sound stupid, but it's a solution.
I used Envy (http:// albertomilone. com/) to install old drivers (96.43.01). Now system works great. Now I turned on powernowd, compiz. Firefox also works great.