[Wayland-bugs] [Bug 93448] Trackpoint speed lock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93448

--- Comment #19 from Peter Hutterer <peter.hutterer at who-t.net> ---
Judging by your description, what you're seeing is the effect of the
trackpoint's re-calibration.

drift_time means if the firmware detects continuous pressure in one direction
for more than drift_time seconds, it recalibrates this as default neutral
pressure. When you then release, the real hardware-neutral now appears as
movement in the opposite direction -  the trackpoint takes a second or so to
recalibrate itself but that's the pull back you see.

I don't think that's something we can reasonably fix in libinput, it's a way
how trackpoints work and your best option is likely to increase the drift_time
to something quite high so you don't see that effect. Or avoid these types of
movements.

The best we could do in libinput is to have something monitor the trackpoint
coordinates and post a warning in the log when it may trigger but this could a)
cause false positives and b) just be hidden in some log somewhere. So a lot of
code for very little gain.

I think just increasing the drift time is the only real option here, sorry.

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