Libinput 1.1.5 Released, Still Dealing With Multi-Touch Woes
The Red Hat input developer noted in the announcement, "This release fixes a disable-while-typing issue on the Macbook Pro and works around some middle-finger tap issues on semi-mt devices. Unfortunately, due to the inconsistent (and often garbage) data that semi-mt touchpads send we had to resort to disabling pinch gestures on those devices to make three-finger taps reliable."
Peter then went on to write a blog post about the semi-mt touchpad problems with libinput for this range of touchpads that are considered "semi multi-touch" but he describes it as "Some devices have an extremely low resolution when two-fingers are down, the data is little better than garbage." Go read this blog post if wishing to learn about shoddy semi-mt touchpads.