[Wayland-bugs] [Bug 98839] Somehow conditionalize hysteresis (hardware black/whitelist, device property introspection, user-exposed setting, etc)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98839

--- Comment #71 from Tomas Janousek <tomi at nomi.cz> ---
I recently applied this hysteresis autodisable patch
(https://github.com/wayland-project/libinput/commit/50daa7b30fd1e13545944540a0ad3794bbf2ef09)
on my T25 and it worked brilliantly, so I applied it on my wife's T440p and
experienced wobble for a second after the finger(s) stopped moving. After that
second, the wobble stops. This was apparently good enough for libinput to
disable its hysteresis, but it makes two-finger scrolling very annoying.

Fortunately I fixed this by upgrading the touchpad firmware:
https://support.lenovo.com/cz/cs/downloads/ds121241 (it says L540, but it works
with T440p as well). So I'm just writing this here in case anyone else happens
to have an old touchpad firmware and the patch gives them wobbles.

(Anyway, thanks a lot for this patch. It was the final missing piece that let
me switch from synaptics to libinput.)

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