To try and workaround the maxcpus=1 or noacpi, you could try the following kernel options instead:
acpi=noirq pnpacpi=off which apparently have been successful in enabling a MacBook Air 2,1 to boot with full dual core cpu support and power management. (from: http://bloggis.se/atte/99928) -- Booting linux crashes on 2009 White Macbook (hardware version ID "MacBook5,2") unless you use acpi=off or maxcpus=1 https://bugs.launchpad.net/bugs/341230 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs