my hp dm1z freezes occasionally during wifi use. It only happens when the wifi is in use, and has happened when different applications are using it (most of the time through browsers, but sometimes with software updates too). It happens maybe once a day or so, and I have to do a hard reset. It's getting incredibly frustrating, and I'm thinking about doing a fresh install of 12.04 to see if that fixes it. I'd rather avoid all that hassle, though. Any ideas on steps to troubleshoot or fix this?