[Wayland-bugs] [Bug 101139] Acceleration still too fast with slow and slow-medium finger movements

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101139

--- Comment #31 from Peter Hutterer <peter.hutterer at who-t.net> ---
Hooray. The good news: based on these videos, I don't think we have a libinput
*bug*, this does appear to be just a different preference. AFAICT, the movement
matches what I got with the lowclip patch, at least considering the finger
motion speed etc.

The bad news: to accommodate for this, we'd need some new pointer acceleration
profile because if *that* is your preferred behaviour, it's going to be
difficult to find a middle ground between the current and your patch. Because I
consider the fast pointer motion (like in your second video) to be
uncontrollable, I don't even get near any target when moving fast.

Adding a new profile is relatively trivial, but it opens us up to a few things:
once you have two profiles, the floodgates are open for N profiles. Anyone not
happy with the current profile will be pushing for another profile slightly
different and that's a situation I really want to avoid.

fwiw, my macos at default speed is a lot faster than the lowclip patch. And
given that we have the accel range, I think the first thing to look at is
moving that baseline. From what I can tell, the macos accel doesn't have that
same unaccelerated plateau that we have, it seems to almost contineously
linear.

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