Jeremy, I'm running the latest upstream kernel (2.6.34-999-generic #201005011008 SMP Sat May 1 09:09:57 UTC 2010 x86_64 GNU/Linux) and I'm still having this trouble. It just happened about 5 minutes ago at approximately 21:11. I don't know exactly what you need to see in terms of logs and I don't really see anything that stands out. Nevertheless, I've attached the messages log from 20:49 up until the computer froze and then did a reboot. Let me know what else you want or need to see and I'll attach them.
** Attachment added: "Messages Log" http://launchpadlibrarian.net/47112403/message_log -- Sudden reboot happens randomly https://bugs.launchpad.net/bugs/572162 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs