For what it's worth, I just upgraded my (Acer Ferrari 4005 WLMi) laptop's BIOS from 3A19 to 3A23 and it had no effect on this.
-- [Edgy] APIC error on CPU0 https://launchpad.net/bugs/65159 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
