Re: Bug Report: Hard crash (freeze) with nVidia GTX 460
Okay, I found the cause of my crashes. It was the ivtv driver for my PVR150. Disabling the ivtv driver has removed all the lockups. eventually found the root cause kernel oops through a serial console debugger.
also explains why memtest and running without the nvidia drivers worked. in all those cases, ivtv was not running either.