[Wayland-bugs] [Bug 103572] Libinput: 1.9+: Magic Trackpad stutters, is unresponsive

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103572

Maximilian Böhm <mabo at elbmurf.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|INVALID                     |---
             Status|RESOLVED                    |REOPENED

--- Comment #20 from Maximilian Böhm <mabo at elbmurf.de> ---
Hey, sorry for my former retirement on this issue. To be honest, I just
downgraded and hoped someone™ would fix it. But now, Plasma 5.12 is forcing me
to use libinput 1.9, so here I am again.
On Arch, I had to install python-evdev and python-pyudev, then I was able to
run "sudo libinput measure touch-size /dev/input/event21".
It seems to be a pressure issue indeed. Using my thumb works best to move the
cursor ("down").

Unfortunately, this seems broken:
$ sudo libinput measure touchpad-pressure --touch-thresholds=100:100
libinput-measure: unrecognized option '--touch-thresholds=10:8'
Usage: libinput measure [--help] <feature> [/dev/input/event0]

So I created a /etc/udev/hwdb.d/99-touchpad-pressure.hwdb
libinput:name:*Trackpad von
maximilian:dmi:bvnAmericanMegatrendsInc.:bvrF3i:bd10/07/2014:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rn990FXA-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:*
LIBINPUT_ATTR_PRESSURE_RANGE=100:100

- to test other ranges. I got the name and DMI from evemu-record:

/dev/input/event21:     Trackpad von maximilian
Select the device event number [0-21]: 21
# EVEMU 1.3
# Kernel: 4.15.2-2-ARCH
# DMI:
dmi:bvnAmericanMegatrendsInc.:bvrF3i:bd10/07/2014:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rn990FXA-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
# Input device name: "Trackpad von maximilian"
# Input device ID: bus 0x05 vendor 0x5ac product 0x30e version 0x160
# Size in mm: 132x111

But after running "sudo udevadm hwdb --update", "sudo udevadm test
/sys/class/input/event21" still shows:
LIBINPUT_ATTR_TOUCH_SIZE_RANGE=150:130
A relogin didn’t help either.
I will contribute every log or command output you need to fix this.

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