I recently updated from Ubuntu 16.04 running Unity to 17.10 running GNOME. Since the upgrade, I'm missing the adaptive acceleration feature on my touchpad. I absolutely loved it because it was more accurate for shorter distances.
On digging a bit, I found out that 17.10 uses GNOME with
libinput instead of
libinput uses a
flat acceleration profile for touchpads by default (https://wayland.freedesktop.org/libinput/doc/1.4.3/pointer-acceleration.html#ptraccel-touchpad).
I also tried installing
xserver-xorg-input-synaptics on 17.10. This works fine, except for the fact that it is too cumbersome to enable 'Natural Scrolling' from the command line (https://askubuntu.com/a/206006). Another problem is that GNOME doesn't show touchpad settings with
synaptics installed (https://unix.stackexchange.com/a/292920).
I also tried fidgeting with
gnome-tweak-tool under the 'Keyboard and Mouse' submenu on the sidebar but it has an option to select 'Acceleration Profile' only for a mouse, not for touchpads (see screenshot in What are Mouse Acceleration profiles in the gnome-tweak-tool?).
Is there a way to enable adaptive acceleration for touchpads with
libinput which has none of the above side effects?