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

[Daniel van Vugt]

Alex,

The mutter fix does set its own settings for TapButtons. And gnome-
control-center (for reasons unexplained) has no GUI to configure it. But
you can affect those settings by installing and running 'gnome-tweak-
tool' and then set:

  gnome-tweak-tool > Keyboard & Mouse > Touchpad > Mouse Click Emulation
= Fingers

which is the same as TapButton1=1 TapButton2=3 TapButton3=2.

If that's not enough then you can also force your own settings by
running command 'synclient'. Once you know the synclient syntax you want
you can apply it automatically at login by running 'gnome-session-
properties'.

And if that's still not enough then you can also log a bug if you like:
https://bugs.launchpad.net/ubuntu/+source/mutter/+filebug

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https://bugs.launchpad.net/bugs/1686081

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

Status in Release Notes for Ubuntu:
  Fix Released
Status in gnome-control-center package in Ubuntu:
  Fix Released
Status in gtk+3.0 package in Ubuntu:
  In Progress
Status in mutter package in Ubuntu:
  Fix Released
Status in xorg package in Ubuntu:
  Invalid
Status in xubuntu-meta package in Ubuntu:
  Fix Released
Status in gnome-control-center source package in Artful:
  Confirmed
Status in mutter source package in Artful:
  Confirmed
Status in xorg source package in Artful:
  Invalid
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.

  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?

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