hal wrote:
>
> rich...@laptop.org said:
> > One absolute we know is that the touchpad hates multi-touches. If you
> > have
> > more than 1 point of contact with the sensor then it will go bonkers. Due
> > to the button placement below the touchpad this is quite easy to do. Its
> > trivial to show that double touches throw the pad into a tailspin. Other
> > failure modes are harder to duplicate.
>
> Thanks. That may be part of my problem.
>
> I keep my left thumb on the left button. My left hand is underneath the XO
> and the thumb wraps around to the button but doesn't get near the touchpad.
> But my ring finger may be drooping down and getting close enough to cause
> troubles. I'll try to keep an eye on that.
>
>
> I would really like to see some feedback when it is doing a recalibrate.
> Can
> somebody point me at the right section of code and/or provide a few hints on
> how to implement that? I'm thinking of a hack, nothing clean and elegant.
> For an experiment, I'd be happy to dedicate any corner of the screen. (Say
> 1/4 inch sq, or bigger if I can't see that fast enough.)
the recalibration happens in the touchpad driver:
http://dev.laptop.org/git/olpc-2.6/tree/drivers/input/mouse/hgpk.c?h=olpc-2.6.31#n601
there's no direct indication to userspace when a recalibration occurs,
but during development i had a script of some sort that watched for
the kernel message you see there, i.e. "Recalibrating touchpad..", and
beeped or something when it happened.
there are other tuneables available as well -- feel free to play
with them, obviously. see here, and following:
http://dev.laptop.org/git/olpc-2.6/tree/drivers/input/mouse/hgpk.c?h=olpc-2.6.31#n78
paul
=---------------------
paul fox, p...@laptop.org
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