[Wayland-bugs] [Bug 100122] Touchpad too "sticky"

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Mar 8 23:22:32 UTC 2017


https://bugs.freedesktop.org/show_bug.cgi?id=100122

--- Comment #3 from Peter Hutterer <peter.hutterer at who-t.net> ---
The problem is that the touchpad loses tracking, e.g. at timestamp 19.891130
you get a finger down but at 19.975974 the finger is released again. The total
time is ca 80ms and well within the tap timeout threshold. The movement is
within a few device units, so that threshold doesn't trigger either. And the
next event comes ca 150ms after the release, so we can't even do a 'lookahead'
to see if we have a busted event sequence. The same applies to the sequence at
20.648695.

Now, there is relatively little we can do but one thing I noticed is that the
pressure defaults are different to what the touchpad sends. So what I'll need
from you is a touchpad recording that's several hours long with a lot of
interaction. That should give me enough information regarding pressure values
for libinput 1.7 and with a bit of luck that may also fix some of this bug.

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