[Bug 1733032] [NEW] Touchpad settings don't work after upgrading to 17.10 (because xserver-xorg-input-synaptics is still installed)

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Since upgrading to 17.10, my mouse pointer is repeatedly and frequently
getting moved against my will when I am typing on my laptop keyboard (as
opposed to external keyboard) because my hand brushes against the
touchpad or even just near its surface.

Furthermore, I don't want tap-to-click to be enabled. I want to actually
have to push down on the mousepad hard enough to click it to generate a
mouse button event. I can't figure out how to disable tap-to-click in
17.10 either.

I did not have these problems _at all_ in 17.04.

I have the touchpad click method set to "Areas" and "Disable While
Typing" enabled in gnome-tweak-tool. This does not help.

I have these lines in the touchpad section of
/usr/share/X11/xorg.conf.d/40-libinput.conf as well:

Option "DisableWhileTyping" "true"
Option "PalmDetection" "true"
Option "Tapping" "false"

They don't help either.

This is a substantial regression in functionality from 17.04.

It appears to be a problem using both Wayland and Xorg.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.1-0ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 17 21:28:05 2017
DisplayManager: gdm3
InstallationDate: Installed on 2017-05-19 (182 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to artful on 2017-10-20 (28 days ago)

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

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


** Tags: amd64 apport-bug artful patch third-party-packages
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Touchpad settings don't work after upgrading to 17.10 (because xserver-xorg-input-synaptics is still installed)
https://bugs.launchpad.net/bugs/1733032
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