Comment 67 for bug 626622

Finally installed Natty, but also still have this same problem. I can confirm that pci=nomsi fixes the problem, as does acpi=off and nolapic. Installed the intel-microcode package, but this doesn't change anything. Maybe I need to do more than just installing it, but I'm not sure what. In any case I can live with booting with pci=nomsi.

As an aside, installing a non-ubuntu kernel does fix the problem (I was using the liquorix kernels no problem)