This really looks like a hw/BIOS bug. Please re-open if that proves to not be the case.
** Changed in: linux-source-2.6.20 (Ubuntu) Status: Confirmed => Rejected ** Changed in: linux-source-2.6.17 (Ubuntu) Status: Confirmed => Rejected -- APIC error on CPU0: 40(40) https://launchpad.net/bugs/66900 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs