Re: [iPAQ] Touchscreen wigglies

A follow-up from a month ago:

On Tue, 2001-12-11 at 02:52, James ''Wez'' Weatherall wrote:
> This is exactly the problem I'm seeing since installing 0.5. I wonder
> whether it's a problem with certain models or batches (is yours a 16 or 32Mb
> ROM unit?)
>
> If, when you get it's flippy-screen fixed, Compaq tell you whether or not
> the touchscreen is iffy (or if it suddenly gets better when it's been
> de-flippyed), then can you mail the list (& CC me, since I'm not on it...)?
I got the whole unit replaced in the end; they didn't even look at it!
I must congratulate Compaq (Australia) for wonderful service.

I had the problem with fam0.4 & fam0.5 (as I point out below); I
installed 0.5.1pre on the new unit (same model, 3630) and don't have the
trouble - so either the problem has been fixed or it's the unit that's
'broken'.

> That way it's effectively FAQed one way or the other!
>
> ---
> James "Wez" Weatherall
mibus

> ----- Original Message -----
> From: "Robert Mibus" <mibus@bigpond.com>
> To: "Christian, Andrew" <Andrew.Christian@compaq.com>
> Cc: "James ''Wez'' Weatherall" <jnw22@cam.ac.uk>; <ipaq@handhelds.org>
> Sent: Sunday, December 09, 2001 9:57 AM
> Subject: RE: [iPAQ] Touchscreen wigglies
>
>
> > On Sat, 2001-12-08 at 05:52, Christian, Andrew wrote:
> > > The touchscreen de-bounce code changed between Familiar v0.4 and the
> > > latest kernels. It seems to be very machine-specific, so testing has
> > > been a problem.
> >
> > > > Does anyone else find that their touchscreen senses the stylus as
> > > being
> > > > about a centimeter away from it's real position just as it is applied
> > > to
> > > > the
> > > > screen? I get this in certain parts of my screen, mainly the centre.
> > > > Once
> > > > it's pressed down firmly, it's OK, but of course by then it's usually
> > > > started clicking somewhere I didn't intend it to.
> > > >
> > > > Is this a debounce problem in the driver, or do I need a new screen?
> > > Can
> > > > the driver be configured to debounce more?
> >
> > I don't know if this is entirely related or not, but I have a similar
> > problem. With low pressure (not always at the start of the stroke), the
> > touchscreen thinks it is coming from up to a couple of centimetres up
> > and to the right of where I'm pressing. Tapping harder solves the
> > problem, but I still fall over it. It's especially annoying when writing
> > softly on the screen.
> >
> > It is easily reproduced on my machine by lightly resting the stylus on
> > the screen and very slowly increasing pressure. I was actually about to
> > ask if this was a hardware or software issue, as I am soon to take my
> > iPAQ in for repairs. (It's doing the screen-flippy thing).
> >
> > Oh, and if I'm in landscape-left, it's down & right, upside-down it's
> > down-left, etc. etc.
> >
> > This happened in 0.4 & 0.5, but I'm not sure if it's the same problem or
> > not - certainly seems the same.
> >
> > HTH
> >
> > mibus
> >
> > --
> > Robert Mibus <mibus@bigpond.com>
> > A little genocide never hurt anyone.
> >
> >

-- 
Robert Mibus <mibus@bigpond.com>
Go ahead, make more bugs! Jobs, jobs, jobs!