[Wayland-bugs] [Bug 85991] Change scroll thresholds to work as motion/time

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85991

            Bug ID: 85991
           Summary: Change scroll thresholds to work as motion/time
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: peter.hutterer at who-t.net
                CC: benjamin.tissoires at gmail.com,
                    jwrdegoede at fedoraproject.org
        Depends on: 85988

The scroll threshold is triggered by a single event exceeding the built-in
threshold. This means it relies on the sampling rate of the device, devices
with lower sampling rate are more likely to have high-enough deltas.

Likewise, continuous motion just below the threshold never triggers scrolling.
This can be simply reproduced by moving two fingers down on the touchpad, just
slow enough that it doesn't trigger (reported by Benjamin at XDC)

The trigger should be dependent on motion/time, not just per event.

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