[Wayland-bugs] [Bug 105696] Apple Magic Trackpad scrolling sensitivity too low (libinput 1.10)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105696

            Bug ID: 105696
           Summary: Apple Magic Trackpad scrolling sensitivity too low
                    (libinput 1.10)
           Product: Wayland
           Version: 1.2.1
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: mabo at elbmurf.de

Hello, after #103572 fixed the overall Magic Trackad sensitivity regression
introduced in libintput 1.9, the patch does not fully restore the previous
level of sensitivity.
Most of the time, cursor movement works reliable but scrolling is still a hit
or miss. I have rather small fingers and soft skin and thought the new touch
range of 60:40 must be set too high (see #103572).
I have followed the instructions in comment 22 to alter the value to 20:10, and
now "sudo udevadm test /sys/class/input/event21" reports
"LIBINPUT_ATTR_TOUCH_SIZE_RANGE=20:10". But this did not fix the scrolling
problem (maybe a tiny bit better than before but this might be an illusion).
Sometimes, I need to really put pressure on the trackpad to start scrolling.
It’s really annoying and I can’t remember this device being so insensitive to
simple scroll gestures in Linux since I have bought it in 2011.
To illustrate this, I have recorded a video (pardon the upright format but in
this case it actually makes sense): https://youtu.be/s-qtTzMP5HA
Interestingly, gestures with more fingers seem to work more reliably (Kwin
effects triggered by libinput-gestures).

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