[Wayland-bugs] [Bug 89683] Two finger scrolling isn't smooth

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89683

--- Comment #10 from Velimir Lisec <lisec.velimir at gmail.com> ---
(In reply to Peter Hutterer from comment #8)
> Related question: did it work before and do you know which one the most
> recent kernel version was that worked? If you use the synaptics xorg driver
> does it work better then?

It didn't work before. Whenever i tried using libinput I always had bad
scrolling. It works great under synaptics driver. Scrolling is done pixel by
pixel. 

I get precise recordings of finger movements from ABS_MT_SLOT 0, but SLOT 1
returns it's previous position minus movement from SLOT 0. Those two cancel out
in libinput and touchpad isn't scrolling. But sometimes SLOT 1 gives correct
recording of a finger position. That's when the jump happens. I guess synaptics
driver only tracks SLOT 0 position for scrolling.

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