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Re: Install USB Mouse, Lose Keyboard

Mike McCarty wrote:
Recently, my girlfriend decided to try the jump to Linux.
I helped her build a dual-boot system with Windows and Debian
on it. She has run it fine for a couple of weeks, except that
her mouse goes "crazy" sometimes. This occurs both with Debian
and with Windows. So I suggested she has a hardware problem with
the mouse.

I gave her a USB optical mouse I have used before, and it works
just fine with both Windows and with Debian.

However, Debian no longer recognizes her keyboard. It sees the
mouse fine, but not the keyboard. Windows still sees and uses
both the mouse and the keyboard with no problem.

You forgot to mention whether the keyboard is USB or not. (See below)
You also didn't specify what it means to say that "Debian no longer
recognizes her keyboard."  Are you running X when the keyboard is not
recognized?  X has an inherent design flaw that makes it prone to this
problem (although I would expect it to lose the mouse as well).  To
sort it out you could check if the problem occurs on a virtual console,
peferably with no X server running.

The motherboard is about two years old with a 2+Ghz Celeron on
it, 512 MB RAM. I have booted Knoppix 3.9 (Debian variant)
and run memtest overnight with no problems indicated.

Does anyone have any suggestions?


The obvious work-around is to try a PS/2 keyboard (or USB, if it's
currently PS/2).  For debugging, if the problem is with USB, I would
look at the hotplug output in the log files.  For example you could
log via ssh and run "tail -f /var/log/messages" and plug and unplug
the keyboard and see what hotplug and the USB driver outputs (or doesn't).
You could also plug and unplug the mouse, while checking the keyboard
and log output.

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