Synaptics clickpad release events

[Nicole Faerber]

Hi!
I assume this happens on most recent kernels, starting vom 3.17?

I had this too and it comes down to a kernel driver issue. The clickpad
is wrongly detected as a so called "Forcepad". I reported the issue on
linux-input and Dmitry and Andrew are taking care of it. A patch should
be introduced to more recent 3.17 kernels shortly.

If you compile your own kernel you can patch the synaptics driver by
commenting out the

...
	if (SYN_CAP_FORCEPAD(priv->ext_cap_0c)) {
	...

(should be easy to find, I do not have a proper patch at hand right now).

Cheers
  nica


Am 29.10.2014 03:25, schrieb Peter Hutterer:
> On Tue, Oct 28, 2014 at 03:16:59PM -0500, ross wrote:
>> Hello all,
>>
>> I have a T440s clickpad that's behaving badly.  When I click the pad, a
>> ButtonPress is sent as soon as I click.  When I release, no ButtonRelease is
>> sent until I actually remove my finger from the touchpad surface.  So most
>> clicks end up as drags - very annoying.  I've tried various options with
>> synclient, but according to xev, nothing changes when the release event is
>> generated.
>>
>> The weird thing: a different T440s (different sku) with the same model
>> clickpad, same software, and same config behaves normally - a ButtonRelease
>> is sent as soon as the click is over, no need to remove the finger.
>>
>> How can I get the first to behave like the second?  I'm using synaptics
>> 1.8.1 from Debian jessie, with Xserver 1.16.1, and Linux kernel 3.16.5.
> 
> try dropping the options from your conf and see if any of them make a
> difference, specifically the Palm options.
> 
> if it doesn't work, record your device with evemu-record and file a bug with
> the recording attached. this allows us to reproduce the issue.
> http://www.freedesktop.org/wiki/Evemu
> 
> Cheers,
>    Peter
> 
>> In /etc/X11/xorg.conf.d/50-synaptics.conf I have the following config:
>>
>> Section "InputClass"
>>         Identifier "Default clickpad buttons"
>>         MatchDriver "synaptics"
>>         Option "HasSecondarySoftButtons" "1"
>>         Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
>>         Option "SecondarySoftButtonAreas" "58% 0 0 15% 42% 58% 0 15%"
>>         Option "VertHysteresis" "30"
>>         Option "HorizHysteresis" "30"
>>         Option "PalmDetect" "1"
>>         Option "PalmMinWidth" "5"
>>         Option "PalmMinZ" "40"
>>         Option "VertTwoFingerScroll" "0"
>>         Option "HorizTwoFingerScroll" "0"
>>         Option "VertEdgeScroll" "1"
>>         Option "VertScrollDelta" "25"
>>         Option "CoastingSpeed" "0"
>> EndSection
>>
>> Thanks for the help,
>> Ross
>>
>> PS - please keep me CCed, as I don't subscribe.  Thanks!
>>
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