I've had a terrible lockup problem since SMP was enabled by default in the kernel. Maybe try adding nosmp to the kernel line in grub's menu.lst (you may need noapic too, not sure though. I needed it, but all cases are different). I haven't tried removing that nosmp line ever since I found out it worked, and I don't plan to any time soon until I know my computer wont commit suicide whenever I download something.
-- [madwifi] Semi-random system lockups in Dapper https://launchpad.net/bugs/37773 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
