Status changed, this issue STILL affects those running the HWE stack on Ubuntu 16.04 with Gnome. ( sudo apt-get install --install-recommends linux-generic-hwe-16.04 xserver-xorg-hwe-16.04 ) will result in outdated version of xserver-xorg-core ( <2:1.17.99.902) being installed which results in an unmet dependency for xserver-xorg-input-libinput and still breaks the tap to click dialogue. Removing the interfering xserver-xorg-input-synaptics obviously breaks things even more...
Status changed, this issue STILL affects those running the HWE stack on Ubuntu 16.04 with Gnome. ( sudo apt-get install --install- recommends linux-generic- hwe-16. 04 xserver- xorg-hwe- 16.04 ) will result in outdated version of xserver-xorg-core ( <2:1.17.99.902) being installed which results in an unmet dependency for xserver- xorg-input- libinput and still breaks the tap to click dialogue. Removing the interfering xserver- xorg-input- synaptics obviously breaks things even more...