Last night I disabled the USB controller in the BIOS, and the machine 
now rocks. I assume when you talk about PIO mode, you're referring to 
the SATA controller. I received a patch from Matthias Drochner which is 
essentially what you're suggesting, and I'll try it out this evening.

However, I suspect the problem really does lie with the USB.

Thanks for the help!

Chris

Blair Sadewitz wrote:
> You don't have bus master DMA enabled, presumably because there's no
> entry in pcidevs for it.  This will force use of PIO mode.  Could you
> try adding a line to pcidevs beneath the entry for 0x024a for 0x024b,
> otherwise identical except, obviously, for the PCI device name?
>
> Regards,
>
> --Blair
>