[Wayland-bugs] [Bug 106323] ALPS SS5 (SS4 v2) trackpoint too fast / jumpy because of readout "hole" in the center

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106323

Peter Hutterer <peter.hutterer at who-t.net> changed:

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                 CC|                            |peter.hutterer at who-t.net

--- Comment #2 from Peter Hutterer <peter.hutterer at who-t.net> ---
> This what I think the above-mentioned settings of the "evdev" driver do, unless I'm mistaken.

Yep, that's what the constant deceleration does. 

> firstly it's almost impossible to carry out because the pointer moves much too fast

fwiw, doesn't really matter because the events will still come in from the
device. Just push it as if it wasn't moving at some crazy speed because we
really just need the realistic pressure values.

The trackpoint curve is in src/filter-trackpoint.c:trackpoint_accel_profile,
you can try to put a /8.0 there before returning the factor. Does that
work/help?

Unfortunately, the whole trackpoint range thing is oriented towards the ibm
trackpoints and doesn't work too well on the alps ones. I have patches here to
work around that but they're not complete yet. Either way, unlikely to fix the
issue anyway if you need that high of a constant deceleration.

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