[ubuntu] weird crashes in 11.04, completely baffled

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http://ubuntuforums.org – I'm completely baffled by this crash: screenshot. it's definitely a system crash because I can't ssh into it after it does this, so i ruled out gnome/compiz I don't think it's hardware because this doesn't happen in low-graphics/fail safe mode, I duel boot windows as well and so far I haven't seen it randomly crashing yet.. here's my lsmod lsmod.txt if anyone can point me in the right direction it would be awesome. (Hardware)