Suspect this is an upstream kernel bug as it also fails in the same way using a knoppix 3.7.1 live cd with kernel 3.0.4
** Description changed: - After upgrade from Natty to Oneiric, kernel fails to start. Using ro text debug photographed trace info, which shows - Code: bad EIP value. + After upgrade from Natty to Oneiric, kernel fails to start. Using ro text debug photographed trace info, which shows + Code: bad EIP value. acpi=off allows system to boot, as does nolapic but only one processor out of 2 shows running Natty as live CD works, and shows 2 processors other noacpi parameters failed. latest available BIOS installed - removed sound card, changed video cars and monitor no difference. + removed sound card, changed video card and monitor no difference. ** Summary changed: - kernel 3.0.0.12 fails to stat unless nolapic specified, ok in Natty + Oneiric kernel 3.0.0-12-generic fails to start unless nolapic specified, ok in Natty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/878031 Title: Oneiric kernel 3.0.0-12-generic fails to start unless nolapic specified, ok in Natty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/878031/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs