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#1 (**permalink**) 02-20-2008, 08:51 PM

Hi all,

When I slide my finger on my Synaptics track pad
and bring it to a stop, the mouse on screen continues
moving for several pixels, sometimes 10 or more.
It is as though motion events had built up in some
buffer and X didn't have time to deal with them.
This only happens with kernel 2.6, not 2.4.
Does anyone know of a solution to this problem?

Thanks.

#2 (**permalink**) 02-20-2008, 08:51 PM

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Useful Info wrote:
> Hi all,
>
> When I slide my finger on my Synaptics track pad
> and bring it to a stop, the mouse on screen continues
> moving for several pixels, sometimes 10 or more.
> It is as though motion events had built up in some
> buffer and X didn't have time to deal with them.
> This only happens with kernel 2.6, not 2.4.
> Does anyone know of a solution to this problem?

I don't know if this will help, but there seems to be a synaptic module
parameter that governs "negative inertia". Also, the driver implements a /proc
entry that lets you tune this "negative inertia" on the fly.

Your description of how the mouse continues to move after you remove your
finger /sounds/ like the description of inertia in the real world. So, perhaps
this "negative inertia" tunable parameter is connected to the inertia you see
with your mouse.

Try tweaking the inertia /proc parameter and see what happens to your mouse
behaviour.

HTH
- --
Lew Pitcher

Master Codewright & JOAT-in-training | Registered Linux User #112576
GPG public Key available upon request | http://pitcher.digitalfreehold.ca/
Slackware - Because I know what I'm doing.
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trackpad problem w/kernel 2.6