[Wayland-bugs] [Bug 104990] XPS13 L322X touchpad laggy

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104990

--- Comment #17 from Peter Hutterer <peter.hutterer at who-t.net> ---
It's a so-called schmitt trigger, pressure needs to go above "down" to be
detected as touch and below "up" to be released again. down > up to make the
touch more resilient.

libinput:name:*CyPS/2 Cypress Trackpad:dmi:*svnDell:*pnXPSL322X*
 LIBINPUT_ATTR_PRESSURE_RANGE=105:60
 LIBINPUT_ATTR_PALM_PRESSURE_THRESHOLD=230

Something like this should work. Check /sys/class/dmi/id/modalias and adjust
the dmi bit accordingly, make sure the svn and pn bits match.
https://wayland.freedesktop.org/libinput/doc/latest/faq.html#faq_hwdb_changes

I'll need you to figure out that hwdb match though, I can't test this locally
without the same machine so anything I'd merge is prone to be buggy.

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