[Wayland-bugs] [Bug 99695] Can't manage acceleration profile on HP 255 G5 "SynPS/2 Synaptics TouchPad"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99695

--- Comment #7 from Peter Hutterer <peter.hutterer at who-t.net> ---
(In reply to giuseppemargarita from comment #6)
> I've actually configured libinput because I opened this bug report and want
> to help you to find the solution. The options are listed in the first
> comment.

fwiw, I was referring to the synaptics options that are there but often unused.

> It would be great if you can reproduce the behavior of these options in
> libinput. But I can't configure noise cancellation and don't know if
> deceleration is available in libinput.

synaptics pointer acceleration is... complicated and almost impossible to
reproduce. Amongst other things, it depends on your screen resolution.
https://who-t.blogspot.com.au/2016/09/synaptics-pointer-acceleration.html

> Okay, but why can't I set the flat profile from the configuration?

we only expose config options when there's something to configure. In this
case we only have one profile, so no point to expose an option.

> I don't know how, I gave you all I could report. Can't you find anything
> from evemu record?

maybe. it's always hard to infer "feel" from pure recording and on top of
that i'm bottlenecking quite badly, so any help is appreciated. The
acceleration code is all in src/filter.c and it's not that hard to
understand (there are plenty of comments, anyway).

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