Optimizing behaviour of Synaptics Clickpad on Sony Vaio Z13

Markus Ellinger meyer at mesw.de
Thu Jan 3 01:44:38 PST 2013


thanks for your helpful feedback!

Am 03.01.2013 02:27, schrieb Peter Hutterer:
> I suspect the cause for this is more the natural shape of your finger. 
> as you press down, the contact surface increases, and the hotspot you 
> get is somewhere in the middle. as you release, the contact surface 
> changes and you get the jump. I can see this here and it's related to 
> how hard you press before releasing. the harder, the bigger the jump. 
> there isn't really anything you can tune in the settings for this 
> particular behaviour. the hysteresis options will help a bit, but 
> hinder some smaller movement. really what we need here is some 
> pressure-based smoothening, to prevent cursor jumps if the pressure 
> changes. 

I now increased the pressure threshold. Just for the archives, I am 
using the following settings:

         Option "FingerHigh" "55"
         Option "FingerLow" "50"

This is high enough to stabilize the mouse position on the end of mouse 
movements significantly. The downside is that I am missing an 
occassional click here when I tap to lightly.

> you need http://patchwork.freedesktop.org/patch/12707/

Thanks, that's great. If this patch is added, will we still need to 
manually set a dead area on the buttons? Or is there a possibility to 
change the default config files so that if there are clickpad buttons, 
those are automatically marked as "dead area"?


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