https://bugs.freedesktop.org/show_bug.cgi?id=99695
--- Comment #4 from [email protected] ---
(In reply to Peter Hutterer from comment #2)
> touchpads don't have configurable acceleration profiles, so the option being
> ignored is expected.
>
> as for pointer movement: the pointer should stay "attached" to your finger
> for all but quite fast movement. i.e. a movement of ca 30mm on the touchpad
> should result in a movement of ca 30mm on the screen. is that not the case?
That's not the case. When I reach the target sometimes I need to correct the
position by a small movement, but most of the time this occurs the pointer
moves too fast and the target is exceeded/overtaken. That's not the behavior I
expect and this issue is not present in synaptics. I don't know why, maybe
because synaptics has more configurable options like noise cancelation or
deceleration factor added to acceleration speed.
Can't you introduce acceleration profiles flat/adaptive for my touchpad in
libinput? I would try to use flat profile and see if it will resolve this
issue.
In the current behavior I feel a certain acceleration when I move my finger
fast and longer and that's not a problem. The only problem is when I move my
finger shorter and it seems that acceleration gives the pointer a boost which
overtakes the target.
Thanks and sorry if my English is bad, I'm from Italy.
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