Random System Freezes in AMD64.
I have found a random but reproducible system freezes using the AMD64 195.22 driver. I had reverted my system to an older card and that resolved my kernel panic on logging out of X. However, I have had 3 system freezes where the system completely freezes and plays a buzzing sound in the speakers.
In 2 of the cases I was using VirtualBox with at least 2 vm's running. I am not sure but believe it is possibly related to turning on 3d acceleration. In the other, I wasn't using any vm's at all but streaming pandora using the flash plugin.
Not sure if this is an NVIDIA issue or not but I have seen enough reports in this area I had to check.