> Can you check the following: If the hang happens, is the mouse/keyboard
> working again when you have removed it an plugged it again into USB?

At least in my case, re-plugging usually didn't fix anything, although I
vaguely remember having success with this once or twice.

> There can be a lot of failure modes, but since the "interrupt-status"
> messages are coming through, the hostcontroller seems to be quite happy
> (otherwise it would be dead and re-plugging won't help). I've seen similar
> messages now and then, but usually the device died.

I think the device disconnected for whatever reason, and was re-assigned
a different ID, which it didn't like, so either it died or it was
disabled.  But I'm not sure how accurate an analysis that is.

> One more question (can't remember if it's mentioned in the first mail): Is
> the keyboard directly connected to the PC or are there any USB-hubs (also
> onboard) inbetween?

The keyboard and mouse are directly connected to the PC in my setup. 
Interestingly, plugging the mouse into the back of the USB hub on the MS
Natural Keyboard Pro causes the problem to happen about ten times as
frequently; but then again, I don't know if it's exactly the same
problem, since I know that the hubs in those keyboards are buggy anyway,
both in Windows and Linux (I have had problems in Windows with printers
and cameras plugged into the hubs on five different MS Nat Kb Pros; a
camera in a burst transfer can actually hang windows when plugged into
the keyboard hub.  Don't use the hub if you have one of those
keyboards).

When plugged into the hub though, you can see some interesting things
happening: Moving the mouse a lot results in it slowing down then
locking up; the light goes off; then the device is re-initialized and
the light comes back on.  Not touching the mouse usually (not always)
prevents any problems from happening.  As soon as you start moving it
again it happens again.  Then sometimes, after the light goes out, it
never comes on again.

Thanks Georg.




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