Oh, I forgot to indicate that the only workaround I've seen is to set MPS 1.1 instead of 1.4 in the BIOS. Supposedly the reason is that there is an entry in the 1.1 table for the USB controller that is missing from the 1.4 table. I'm not sure if that is correct, but it sounds plausible. At any rate, if you have MPS 1.4 and SMP and USB working...that I have not seen. =)