I've had USB problems on my installation of Mandrake 10.1, and lots of
googling around has led me to think that there's a fundamental USB
interrupt handling problem in there somewhere.
I haven't seen any good explanation or solution of the problem
anywhere. There are various reports of USB device communication
problems, sometimes with "Control timeout on ep0out" (or ep0in)
errors. My particular incarnation was a USB printer problem.
One suggested fix (can't remember where) was to use noapic at boot.
In my case this did indeed fix the USB problem, but then any attempt to
logout or shutdown via the KDE dialogue caused the machine to
lockup ... !!?? I removed the noapic switch, and sometime later I
realised that the USB printer was working. I still get occasional
problems, but usually fixed by power cycling the printer.
Not very reassuring behaviour. If I'd wanted this kind of thing I would
have stuck with Windows.
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