Further research uncovered a similar MacBook5.1 failure (using nvidia chipset).
https://bugs.launchpad.net/mactel-support/+bug/338083 Try adding "reboot=pci" to the kernel command line. It works for me using linux-2.6.32-rc1 (my own) kernel. Please report success/failure. -- nvidia-based Mac Mini (Macmini3,1) won't reboot (but will halt) https://bugs.launchpad.net/bugs/343781 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