Touchpad accel, spirals and xset

[Walter Bender]

On Tue, Jan 19, 2010 at 10:39 AM, Paul Fox <pgf at laptop.org> wrote:
> martin wrote:
>  > On Mon, Jan 18, 2010 at 8:47 PM, Paul Fox <pgf at laptop.org> wrote:
>  > >  > According to the man page the 2nd parameter is the threshold at which
>  > >  > the acceleration value is applied so I'm not surprised that you don't
>  > >  > see any difference between 0 and 1.  Even 4 might be hard to see.  I
>  > >  > think that to see a difference for fine motor this value will have be in
>  > >  > the 5 to 10 range.
>  >
>  > Right -- I did apply Paul's recommendations. The manpage isn't
>  > necesarily going to know all the interactions between our TP, kernel
>  > driver and xorg input driver. Experimentation and source review carry
>  > more weight.
>  >
>  > I assume Paul did both -- he's been looking at this for a while.
>  >
>  > Now, in my experimentation with the values he supplied, it did not
>  > make any difference.
>  >
>  > > martin isn't seeing a difference, which surprises me, because i
>  > > definitely saw a difference between 0 and 1.  from the wiki page
>  >
>  > Ok. Gentlemen, maybe it's a better idea to grab 2 XOs, setup 802 on
>  > one, 802B1 on the other, and run a quick test with the stock settings,
>  > and other settings you think might help.
>
> now that i'm in the office, i can do exactly that today.
>
>  >
>  > Also, Paul, did you get any response from deployments on whether the
>  > new kernel + xset values improved noticeably on the jumpyness?
>
> i'm afraid i've gotten not much feedback at all.  and what i did
> get was nothing much more than "it didn't make it worse".  :-/
> i also hoped to get feedback from the folks running F11-on-XO1,
> since they're all using the new driver as well (and, i think the
> new xset values, but i'm not positive of that), but don't recall
> getting any.
>
> using my own XO, i feel that it's better, but i'm way too familiar
> with the code, and the exact nature of the touchpad problems, to
> be objective. :-/  (my wife agrees with me, but she's hopefully
> not completely impartial either.  ;-)
>
> paul
> =---------------------
>  paul fox, pgf at laptop.org
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>

Where we really need feedback is from the field. Some of the worst
touchpad issues I have seen are in a school deployment in Lima.
Perhaps Hernan's team at USMP could do some testing?

(FWIW, I am still of the opinion that we may want to disable the
touchpad on the old hardware and re-enable the resistive pad, which
should be more immune to some of the problems we have been
experiencing.)

regards.

-walter

-- 
Walter Bender
Sugar Labs
http://www.sugarlabs.org