I experienced this problem when doing a *clean installation* of Ubuntu
GNOME 16.04.3.  I confirmed that the synaptics driver was in use.  apt-
get update; apt-get upgrade did not resolve the problem.

I was able to get the touchpad settings working by uninstalling the
synaptics driver and installing libinput.  I had to upgrade a held-back
dependency in order to do this, and I'm not sure if the result was
entirely kosher.

It seems like a clean installation should not have this problem, nor is
it clear to me how the synaptics support got dropped in Ubuntu GNOME
16.04.3 when the upstream version affected was 3.20, and 16.04.3 is
still documented as including GNOME 3.18.  I can understand how these
kinds of issues can occur in an upgrade to a new major version such as
17.10, but it's really a big boo-boo to have this sort of breakage in
the routine updates to an LTS release.  It would at least be helpful to
mention this issue in the release notes for UG 16.04.3.

You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to xorg in Ubuntu.

  If -synaptics is installed, GNOME Mouse & Touchpad Settings doesn't

Status in Release Notes for Ubuntu:
  Fix Released
Status in xorg package in Ubuntu:
Status in xubuntu-meta package in Ubuntu:
  Fix Released
Status in xorg source package in Artful:
Status in xubuntu-meta source package in Artful:
  Fix Released

Bug description:
  I'm splitting this issue off from LP: #1685542 (which made xserver-
  xorg-input-all no longer recommend xserver-xorg-input-synaptics) for
  tracking the remaining issues.

  gnome-control-center only supports libinput. If xserver-xorg-input-
  synaptics is installed (because it's used by some desktops which
  haven't been ported to libinput yet), synaptics overrides libinput.
  That makes gnome-control-center's Mouse & Touchpad settings panel only
  show basic settings and important configurations don't work.

  1. Which desktops/apps still need -synaptics?
  - Unity
  - Xfce?
  - LXDE? LXQt?
  All the other major desktops have already been ported (LP: #1417980)

  2. Can these apps be ported or removed before 18.04 LTS is released?

  3. Can the desktops be ported and how bad is it if they are not ported
  and -synaptics is no longer available?

  4. If -synaptics can't be removed completely from 18.04 LTS, does it
  make sense to have gnome-control-center Conflicts: xserver-xorg-input-

  5. Is there any other way we can fix this conflict?

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