Chris Ridd wrote: > It (a Dell Precision 470) appears to just have a single switch to > disable "the" USB controller. My kbd and mouse are both USB (looks > like they're on uhci#2), so disabling USB entirely would make the > machine hard to use :-) > > Can you do:
# echo "::prtusb" | mdb -k It may be there is a device connected to uhci#2 for which the interrupt gets stuck.