Comment 14 for bug 1480673

I can confirm that the touchpad multitouch works since the 4.15 kernel (installed from here http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15/)! No blacklisting nesesery.

For more advanced gestures you can additionally use this https://github.com/bulletmark/libinput-gestures (also tested, works)

Sadly, no fluid pinch-to-zoom gesture (only works as a button press simulation, but I don't think any linux touchpad has this)