Comment 8 for bug 1576685

Hi, the synaptics (libinput also installed) package work well for me in 16.04 (and previous version to 12.04 at least) up to 17.04 on thinkpads (x2XX to carbon X1). Currently using carbon x1 5th gen. There is however some form of instability with settings that affects many users including me.

Sometimes the disable while typing feature stops working and reinstall of libinput and synaptics drivers help. I.e, reinstall xserver-xorg-input-synaptics and -libinput as well as running:

gconftool-2 --set --type boolean /desktop/gnome/peripherals/touchpad/touchpad_enabled true
https://help.ubuntu.com/community/SynapticsTouchpad#Touchpad_not_working_after_login

However, what perplexes me is that the gnome desktop (gnome default) does not work with synaptics disable while typing when it clearly works in unity at the same time. I'm testing gnome before 18.04 and login in/out between both desktops, with the exact same settings (gconf, drivers etc).

Currently I'm writing this in gnome and the cursor skips with random artefacts that make the keyboard defunct. In unity it works perfectly (two finger scroll, trackpoint etc works).

Related:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/1687191