Comment 2 for bug 1576685

The setting in gnome-control-center was removed since the setting was changed to be default to always active. Its certainly working on my laptop however I had xserver-xorg-input-libinput installed (but no changes to config files).

3.20 removed evdev/synaptics support completely in favour of libinput, however I thought 3.18 has support for both. Switching the input backend post-release seems like a pretty invasive change, unless everything is completely broken?