Trackpad scrolling regression

[Cefn]

As of a recent reboot, my trackpad no longer triggers scroll events. I haven't changed any settings within gnome to my knowledge.

I had just upgraded xorg - a new version appeared in the main repositories yesterday or so. I'm running the latest saucy mainline kernel too for reference...
$ uname -a
Linux cefn-saucy-portege 3.11.0-031100-generic #201309021735 SMP Mon Sep 2 21:44:40 UTC 2013 i686 i686 i686 GNU/Linux

Not much more detail to report. The whole of the trackpad now works as a trackpad, and there is no longer any scroll behaviour, where previously there was a column on the right of the trackpad which triggered scroll events (which was good).

Two fingered scroll has always been grayed out on my Mouse and Touchpad settings on this machine.

Sadly one of the reasons I'm running Ubuntu Gnome is to get my trackpad configured properly. Looks like a regression somewhere between the mainline kernel and xorg or gnome-shell settings.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-shell 3.8.4-0ubuntu3
Uname: Linux 3.11.0-031100-generic i686
ApportVersion: 2.12.1-0ubuntu3
Architecture: i386
Date: Wed Sep 11 09:09:04 2013
DisplayManager: gdm
GsettingsChanges:
 b'org.gnome.desktop.interface' b'clock-show-date' b'true'
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
InstallationDate: Installed on 2013-08-15 (26 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Alpha i386 (20130626)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jeremy Bícha (jbicha)]

Thank you for reporting this bug to Ubuntu. I apologize that we are not always to respond to bug reports promptly. Ubuntu 13.10 reached End of Life in 2014. See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

Please upgrade to Ubuntu 16.04 LTS and re-test. If the bug is still reproducible, increase the verbosity of the steps to recreate it so we can try again.

Do feel free to report any other bugs you may find.