My HP DM1Z has been freezing since I installed Ubuntu 12.04 64-bit on it. I'm dual booting with Windows 7 64 bit, and though I don't use it super often, I have no freezing problems with windows. At first I thought the problem in Ubuntu was related to the wifi, since it always seemed to happen when I was either downloading something or using firefox. However, in the last few days it has happened even when I have the wifi turned off. Last night I did a fresh install, hoping this would take care of whatever was the matter. Unfortunately it did not, and I've had two freezes today. It's an extremely hard freeze, immune to magic REISUB. It happens once or twice a day, and I have to do a hard reset each time. Not exactly easy on the hard drive, so I'm eager to get it fixed.

If anyone has any suggestions for how to go about troubleshooting this, I'd really appreciate it.