Re: elantech touchpad issues

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Hi Richard,

I will try to find a touchpad that matches your model and see what I can
do.

jj

On Tue, 06 Sep 2011 16:53:25 +0200, Richard Schütz <r.schtz@xxxxxxxxxxx> wrote:
> Hello everybody!
> 
> I'm owning a Samsung N145P netbook, that comes along with an elantech 
> touchpad:
> 
> [    5.949921] elantech: assuming hardware version 2, firmware version 
> 4.2.22
> [    5.985481] elantech: Synaptics capabilities query result 0x09, 0x14, 
> 0x0b.
> 
> It has some annoying issues, which hopefully can be resolved now as 
> there is some ongoing development on the driver again. I have already 
> tested the current "[PATCH v5 0/8] Input: elantech: add support for 
> newer hardware" patchset, but without success.
> 
> 
> The device's axis ranges, which are reported to userspace, seem to be 
> totally wrong.
> 
> (kernel 3.0.4)
> [    17.940] (--) ETPS/2 Elantech Touchpad: x-axis range 8 - 1144
> [    17.940] (--) ETPS/2 Elantech Touchpad: y-axis range 8 - 760
> 
> (kernel 3.0.4 + patchset)
> [    16.936] (--) ETPS/2 Elantech Touchpad: x-axis range 0 - 1152
> [    16.936] (--) ETPS/2 Elantech Touchpad: y-axis range 0 - 576
> 
> I get the following ranges, when I use synclient in monitor mode to look 
> which values really are passed to the synaptics driver in X:
> 
> (kernel 3.0.4)
> x: 0-819
> y: 355-760
> 
> (kernel 3.0.4 + patchset)
> x: 0-819
> y: 171-576
> 
> Because of this differences the edge/scrolling areas of the touchpad are 
> calculated wrong and can't be used by default.
> 
> 
> The other issue occurs very often when two fingers are used:
> 
> (kernel 3.0.4)
>      time     x    y   z f  w  l r u d m     multi  gl gm gr gdx gdy
>     7.982  1020 -268 127 2  7  0 0 0 0 0  00000000
> 
> (kernel 3.0.4 + patchset)
>      time     x    y   z f  w  l r u d m     multi  gl gm gr gdx gdy
>     3.118  1020 -444 127 2  7  0 0 0 0 0  00000000
> 
> When the fingers are released this strange values are reported. This 
> makes two finger scrolling unusable, because it jumps back to the 
> beginning everytime.
> 
> -- 
> Regards,
> Richard Schütz
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