[ubuntu-x] evdev touch screen input noise filter

[Maarten Lankhorst]

op 16-05-14 15:29, Dan Squires schreef:
> Hi there,
>
> In our application we have the misfortune of having to use a capacitive kiosk touch-screen that seems to have a horrendous problem with electrical noise pickup, to the point where the cursor moves across the screen rapidly (oscillates) by upto hundreds of pixels.
>
> Since Ubuntu 11.04 we have been applying a hack to the evdev code to reduce this noise to bearable levels by doing some fairly aggressive filtering. I'm assuming the supplied windows driver must do something similar as I am told there is little if any noise apparent when plugged into such a PC.
>
> I am hoping to get a better solution integrated into future distributions but do not know where best to apply such a patch that would be acceptable.
>
> hopefully somebody can make some suggestions?
Sounds like something you should ask to "X.Org Devel List" <xorg-devel at lists.freedesktop.org> and linux-input at vger.kernel.org
They might know more than me. :-)

~Maarten