why can't I unload usbcore?

[Matt Price]

hi,

I'm trying to diagnose an intermittent but sometimes persistent problem
with sudpend-to-disk on my laptop, one which appears to have something
to do with usb.  so I'm trying to unload all the usb modules, but don't
seem to be able to do that with usbcore.  my procedureh ad been:

modprobe -r ehci-hcd uhci-hcd hci_usb
umount -l /proc/bus/usb (won't unmount unless I add the '-l' swich)
modprobe -r usbcore

with the last command I get a " FATAL: Module usbcore is in use."

but I can't tell what's 'using' it.  
lsof | grep -i usb gives no results, for instance.  

any hints on how to figure this out?

thanks,


matt



-- 
Matt Price
History Dept
University of Toronto
matt.price-H217xnMUJC0sA/PxXw9srA at public.gmane.org
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