Sounds like a lock race, which would explain why it isn't in the -386 kernel (since it isn't SMP).
If you can reproduce this while in console, perhaps we can get some sort of information from the kernel there. If it does show immediately, please let it sit for awhile to see if some soft lockup message shows up. This may be the only way to determine where it is showing up. ** Changed in: linux-source-2.6.17 (Ubuntu) Status: Unconfirmed => Needs Info -- Random hardlocks experienced in Edgy https://launchpad.net/bugs/72800 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs