[Wayland-bugs] [Bug 104569] Touchpad two-finger scrolling is 2x the velocity of cursor movement

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104569

--- Comment #2 from Daniel van Vugt <daniel.van.vugt at canonical.com> ---
Thanks. I'm slightly surprised it is averaged because that means the average of
two fingers scrolling something appears to have double the velocity of one
finger moving the cursor. This implies it's not the gesture recognition that
needs improving but just the velocity, which could be done anywhere in the
stack. So I'll need to try some more things to see if it's best tweaked
somewhere like Xwayland or GTK instead.

My goal is to have two finger natural scrolling moving the scroll area at about
the same speed as one finger would move the cursor. Presently it feels like
double that so scrolling with one finger stationary appears to give a more
natural speed, similar to macOS or ChromeOS. I know fixed/floating-point scroll
axes are not usually in the same units cursor motion, but we can get the
perception closer than it is just by halving the scroll velocity somewhere.

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