Fix touchpad scroll speed in Wayland

wayland-touchpad-scroll-fix.md

Touchpad scroll too fast in Wayland?

You may try this: https://wayland.freedesktop.org/libinput/doc/latest/absolute-coordinate-ranges.html#absolute-coordinate-ranges-fix

But once you find nothing works, try this:

https://gitlab.com/warningnonpotablewater/libinput-config

On my XPS 13 9370, /etc/libinput.conf:

scroll-factor=0.15