@Andy:
Thanks for the very useful conf file!

It seems that sometime in 2010/2011 the default directory has switched from 
/etc/X11/xorg.conf.d/ to /usr/share/X11/xorg.conf.d/ ... so we should use that 
instead. There is already a 50-synaptics.conf file there. Currently I've pasted 
your config in a new 52-synaptics-x230.conf and it works well*.
But for a proper fix the responsible Ubuntu maintainers should put it into the 
already present 51-synaptics-quirks.conf (which is obviously meant for such an 
occasion) with the correct MatchTag.

I'd provide the MatchTag myself if I knew how to get it properly, but
'udevadm info --export-db' doesn't seem to offer anything directly
useful and 'xinput -list' gives the fairly generic 'SynPS/2 Synaptics
TouchPad'.


* As an aside, I'm not sure if your config is 100% tuned, because my touchpad 
still jumps (just a few pixels) when moving slow-ish over the screen, but much 
less than before and I'm generally using the trackpoint anyway, so it's no big 
deal for me.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-input-synaptics in Ubuntu.
https://bugs.launchpad.net/bugs/1042069

Title:
  Jumpy Mouse Cursor using Thinkpad X230 Touchpad

Status in “xserver-xorg-input-synaptics” package in Ubuntu:
  Confirmed

Bug description:
  Really annoying bug!

  Trackpoint moves the mouse cursor smootly,
  when using the touchpad i have a jumpy cursor. (vertically it moves fine, 
horizontally it moves always 4 pixels at once).

  Please see the following demonstration video:
  http://www.youtube.com/watch?v=XUVRKFUsAmc

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: xserver-xorg-input-synaptics 1.6.2-1ubuntu4
  ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2
  Uname: Linux 3.5.0-11-generic x86_64
  ApportVersion: 2.5.1-0ubuntu2
  Architecture: amd64
  Date: Mon Aug 27 08:08:27 2012
  InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120824)
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: xserver-xorg-input-synaptics
  UpgradeStatus: No upgrade log present (probably fresh install)

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