[Wayland-bugs] [Bug 104788] Touchpad hysteresis doesn't work

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Feb 6 01:39:47 UTC 2018


https://bugs.freedesktop.org/show_bug.cgi?id=104788

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEEDINFO                    |RESOLVED

--- Comment #6 from Peter Hutterer <peter.hutterer at who-t.net> ---
doh. looks like this is the same as Bug 104828

 event7   POINTER_MOTION   +14.11s        4.47/  0.00
 event7   POINTER_MOTION   +14.12s        0.29/  0.00
 event7   POINTER_MOTION   +14.15s        5.65/  0.00
 event7   POINTER_MOTION   +14.18s        0.56/  0.00
 event7   POINTER_MOTION   +14.19s        1.07/  0.00
event7  - hysteresis disabled
 event7   POINTER_MOTION   +14.29s        0.00/ -0.93
 event7   POINTER_MOTION   +14.31s        7.11/ -0.16
 event7   POINTER_MOTION   +14.35s        0.00/  0.66


Judging by the timestamps you get regular jitter/wobble but then there's a
pause of ~100ms, just above the timeout that causes libinput to disable the
hysteresis on this device.

We need some smarter approach, i.e. something that analyses the motion for
wobbles and then disables/enables it based on that.

*** This bug has been marked as a duplicate of bug 104828 ***

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