Ubuntu 17.10 natural scrolling
Solution 1:
I followed advice from answers to the queston How to enable natural scrolling with mouse in 17.04?. In my case removing xserver-xorg-input-synaptics and restarting did the trick:
sudo apt remove xserver-xorg-input-synaptics
Solution 2:
I got it working on mine. Credits to @pilot6 and Antonio Kordic for getting me to the correct solution: mine works with edge scrolling.
And is has nothing to do with libinput. The gsetting the settings use seems to be wrong initially(!). This was it:
gsettings set org.gnome.desktop.peripherals.touchpad edge-scrolling-enabled true
Even weirder: changing "edge scrolling" in settings->mouse now ALSO works. And turning "natural scrolling" off now also reverses the direction. I do not get why this now works but it works for me ;)