Ubuntu 12.10 on Dell Precision M4600 APIC issues
I’ve recently installed Ubuntu 12.10 on a Dell Precision M4600 and had some APIC issues when trying to reboot, the same as everyone else seems to have pretty much. After upgrading the BIOS from A08 to A13 the issues seems to have gone away (not extensively tested, but so far so good).
Before the update, the computer got stuck on the last step of shutting down for restart, but after upgrading to A13 the computer is no longer stuck at that point anymore.