Comment 9 for bug 1325426

I still having the same trouble, the command:
sudo apt-get install --reinstall nvidia-331
doesn't work for me. I'm running now kubuntu 14.04, i started with this trouble when upgraded from 13.10 a week ago. Until now I never ever had troubles with nvidia driver and I’m using it for more than 10 years in different linux versions. The most funny is that I came to this thread looking for a fix to the trouble that I have after trying the fix showed in this forum thread http://ubuntuforums.org/showthread.php?t=2217923&p=13008050#post13008050
I started having trouble with the repository package, then someone say it fixes using the nvidia installer downloaded from web, and fails again. Then someone else say this is solved using repository package again, funny.