kern/56613: synaptics touchpad barely usable in 9.99.93

[martin%NetBSD.org@localhost]

>Number:         56613
>Category:       kern
>Synopsis:       synaptics touchpad barely usable in 9.99.93
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jan 11 08:05:00 +0000 2022
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.93
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 9.99.93 NetBSD 9.99.93 (NIGHT-OWL) #746: Sun Jan 2 13:44:10 CET 2022 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

I have two (older) notebooks where the touchpad is mostly unusable in -current
(while it used to work fine for quite a while).

Dmesg from this machine I'm typing on:

pms0 at pckbc1 (aux slot)
pms0: Synaptics touchpad version 7.2
pms0: Extended W mode, Up/down buttons, Palm detect, Multi-finger Report
pckbc1: using irq 12 for aux slot
wsmouse0 at pms0 mux 0


Dmesg from the other machine:

pms0 at pckbc1 (aux slot)
pms0: Synaptics touchpad version 6.5
pms0: Palm detect, Two button click pad
pckbc1: using irq 12 for aux slot
wsmouse0 at pms0 mux 0


The problem is not simple to describe, main issue is that moving to a certain
position, lifting finger and putting it down again at (subjective) same
position makes the mouse jump off by several hundred pixel. Like: move
the mouse cursor to an OK button and try to click it, but before the click
the mouse jumps outside the dialog/prompt window.

But also moving the mouse over large distances where you can not
position it in one swipe is hard, as the beginning of the second swipe
causes some absolute reposition.

>How-To-Repeat:
s/a

>Fix:
n/a