Date: Fri, 12 Sep 2003 11:14:34 +0200 (MEST)
From: Daniel Blueman <daniel.blueman@gmx.net>
To: linux-kernel@vger.kernel.org
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Subject: Re: horrible usb keyboard bug with latest tests
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I experienced some problems with the synaptics touchpad on a really old
laptop with linux-2.6.0-test4, where movement detected by the touchpad would
cause a stream of kernel messages to be logged.

I'll test again with test5. I doubt this is related to recent changes with
the posting events to the random pool on key and not mouse movement.

---

Andrew Morton <akpm@osdl.org> wrote in message
news:<uIA4.Pz.7@gated-at.bofh.it>...
> Andries Brouwer <aebr@win.tue.nl> wrote:
> >
> > > For me too, even with a normal keyboard attached to the PS/2 keyboard
port.
> > > In my case it's very rare, and not a 'constant stick' but short
'pulse' of
> > > the same character like displaying 'kkkkkkkkk' in my terminal even if
I'm
> > > sure that I didn't forget my finger on the key. OK, it's not a
showstopper
> > > bug, but sometimes annoying. It's 2.6.0-test3 (vanilla).
> > 
> > Yes, I see this too, but very infrequently.
> > 
> > For the 2.6 kernels key repeat is not taken from the keyboard but is
> > done via a kernel timer, and clearly the code is not quite correct.
> > I have not yet been able to detect it before I already
> > had hit the next key but maybe somebody else can answer:
> > 
> > When does this repeat stop?
> > Does it stop because the next key has been hit?
> > 
> > And: does it occur more often when the machine has high load?
> 
> It happens to me madly on one of my machines.  The machine is just some
> three-year-old PS/2 setup.  It's due to mouse activity.
> 
> To reproduce:
> 
> 1: press and hold a key
> 
> 2: start moving the mouse in large, rapid circles
> 
> 3: release the key.
> 
> The keystrokes continue to be inserted for an arbitrarily long period:
it's
> easy to generate thousands of them.  The mouse has to be moved in circles:
> moving it from side-to-side causes small stops which allow things to
> correct themselves.
> 
> It's quite irritating in practice.

-- 
Daniel J Blueman

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