>
> You must be running an old SRM version on the DS10, the later ones disable
> USB altogether. I once tried my DS10 and after upgrading beyond a specific
> (forgot which..) SRM rev the USB was gone.

yup. That was it.  Upgraded to SRM 6.2.something and the ohci entry went
away and now my machine has its Chewy Alpha Goodness(tm) back...no more
70% interrupt load.

I do still get "stray irq 1" when I use a keyboard and monitor for the
console, but since this machine is on a serial port...i'm not too worried
about it.