I am also getting this same problem with my Apple Magic Trackpad on my Lenovo T540 using only the bluetooth built-in to the laptop, running Ubuntu 14.04.
My trackpad worked fine on older T510 running Ubuntu 12.04.
I am also getting this same problem with my Apple Magic Trackpad on my Lenovo T540 using only the bluetooth built-in to the laptop, running Ubuntu 14.04.
My trackpad worked fine on older T510 running Ubuntu 12.04.