Comment 1 for bug 1585613

The "not moving at all" problem is bug 1528109, fixed in Mir 0.22.0.

The remaining issue is that the libinput acceleration curve is subjectively not a pleasant one to use, and the cursor soon (non-linearly) moves too quickly. That's bug 1524145 still open. But the fix for that is simple -- we just need to default to acceleration 'off'. Then the cursor will move exactly like it does in Unity7.