Finally... The touchpad works great!

[jpalus]

For the most part, it works. However, it seems to go out of whack every once in a while, i.e. phantom mouse clicks, movement all over the place, etc.

Sounds like bad palm rejection, no? I just have learned to keep my hands clear of the trackpad when typing but sometimes it doesn't help.

Not sure it's that. Required a reboot to sort it.

It was already mentioned in previous comment but no solution so far. Except that I was able to confirm it's undoubtedly a firmware issue: if active hub is attached to USB port, power is delivered also to USB keyboard and therefore to trackpad so reboot/poweroff doesn't reset the trackpad state even though whole software stack is completely reloaded (self generated events continue to happen even after restart when external USB power is attached).