[Wayland-bugs] [Bug 95290] synaptics touchpad jitter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95290

--- Comment #11 from liam at fightingcrane.com ---
Hi Peter,

I applied the hwdb override that you provided, but the problem persisted.

However, working from your matching pattern for udev, I applied an evdev
override as follows:

evdev:name:*SynPS/2 Synaptics TouchPad*:dmi:*svnLENOVO*pvrLenovoYoga213:*   
 EVDEV_ABS_00=:::22
 EVDEV_ABS_01=:::22
 EVDEV_ABS_35=:::22
 EVDEV_ABS_36=:::22 


Those fuzz values are far higher than the default values of 8, but I found them
with trial and error. IOW, they probably aren't the min. 
I'm going to attach a couple of smaller screencasts which demonstrate the
results of LIBINPUT_WOBBLY_MODEL_TOUCHPAD, and the above evdev override.

I wonder if there is an issue with my touchpad's resolution. That would
explain, I think, the jumps, and the insanely twitchy scrolling speeds (which I
haven't yet reported). I did physically measure the touchpad, and it matched
the values from the udev hwdb (though not the far more precise values reported
by some other tool...which I cannot recall the name of).

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