In message <20030223081618.EDE357B4D@berkshire.research.att.com>, "Steven M. Be
llovin" writes:
>>Is there a good way to "ping" USB devices or anything like that?  I'd like to
>>start doing more work to check on whether devices are still alive or not.

>The usbdevs command, perhaps?

That doesn't seem to notice; I assume it's listing "devices not yet detached".
Unfortunately, devices don't detach when they go dead like this; you have to
unplug them before the system will notice.  (And, as a secondary issue, on
several of my hubs the system won't notice even then.)

-s