Comment 8 for bug 130731

Hello,

It seems to me that I encountered the same problem... With 64 Bits version of ubuntu upgrade to Hardy from Gusty

Here I found the solution :
http://ubuntuforums.org/showthread.php?t=699693

This solved my problem:

sudo apt-get install nvidia-glx-new linux-restricted-modules-$(uname -r) --reinstall

Hope this helps someone too.
Best regards,
PyrosBrother