[Wayland-bugs] [Bug 91369] Libinput 0.19 and 0.20 ignore POINTINGSTICK_CONST_ACCEL

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91369

--- Comment #30 from Peter Hutterer <peter.hutterer at who-t.net> ---
(In reply to Justin Wong from comment #28)
> The only thing that my patch did is mutiplies incline and dpi_factor, in my
> case, I made incline = incline * 3.

The main question here is: is this a general requirement for these trackpoints,
or just one on your specific laptop? I don't use the trackpoint that much, but
I can tell even on the T440s I have it's not ideal - when it kicks in it's way
too fast.

> I mean that can we just add a hwdb option to modify this incline? That would
> cover many devices I thought.

no. the hwdb is not a configuration system, it's a system to store hw-specific
properties. the CONST_ACCEL property is there to roughly make pointing sticks
behave the same, similar to setting/adjusting the resolution on touchpads, etc.
The premise here is that libinput (or other input stacks) can use the hardware
with a known baseline and then go from there.

Again, the best solution here would be to write the patches for a separate
acceleration function and then go from there.

(In reply to Dominic from comment #29)
> Let me chime in here... I am using a Thinkpad x230 and the trackpoint
> *still* feels too slow (set to maximum speed in Gnome, that is). I'd like to
> have a bit of choice here,too. :)

Note that the x230 patches I mentioned above only affect the touchpad, which is
pretty horrible. So I guess the same applies for you too - let's separate the
trackpoint accel out first, then we can start fine-tuning it.

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