Comment 2 for bug 1419759

Information from bug 1415358, the touchpad was detected as a "PS/2 Generic Mouse" as expected.

u@u-HP-ZBook-15-G2:~$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ syntp id=6 [slave pointer (2)]
⎜ ↳ PS/2 Generic Mouse id=12 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
    â†³ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
    â†³ Power Button id=7 [slave keyboard (3)]
    â†³ Video Bus id=8 [slave keyboard (3)]
    â†³ Sleep Button id=9 [slave keyboard (3)]
    â†³ HP HD Webcam id=10 [slave keyboard (3)]
    â†³ AT Translated Set 2 keyboard id=11 [slave keyboard (3)]
    â†³ HP Wireless hotkeys id=13 [slave keyboard (3)]
    â†³ HP WMI hotkeys id=14 [slave keyboard (3)]