[Bug 1686081] [NEW] If -synaptics is installed, GNOME Mouse & Touchpad Settings doesn't work

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Ubuntu Foundations Team Bug Bot (crichton):

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.

Questions
---------
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-
synaptics?

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

** Affects: ubuntu-release-notes
     Importance: Undecided
         Status: Fix Released

** Affects: gnome-control-center (Ubuntu)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: In Progress

** Affects: gtk+3.0 (Ubuntu)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: In Progress

** Affects: mutter (Ubuntu)
     Importance: Medium
     Assignee: Daniel van Vugt (vanvugt)
         Status: In Progress

** Affects: xorg (Ubuntu)
     Importance: High
     Assignee: Jean-Baptiste Lallement (jibel)
         Status: Invalid

** Affects: xubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: gnome-control-center (Ubuntu Artful)
     Importance: Undecided
         Status: Confirmed

** Affects: mutter (Ubuntu Artful)
     Importance: Undecided
         Status: Confirmed

** Affects: xorg (Ubuntu Artful)
     Importance: High
     Assignee: Jean-Baptiste Lallement (jibel)
         Status: Invalid

** Affects: xubuntu-meta (Ubuntu Artful)
     Importance: Undecided
         Status: Fix Released


** Tags: gnome-17.10 iso-testing patch
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If -synaptics is installed, GNOME Mouse & Touchpad Settings doesn't work
https://bugs.launchpad.net/bugs/1686081
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