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CID: 201301-12655 Lenovo X230S

Steps:
1. Install 12.04.3 and boot to desktop.
2. Try to control coursor with the trackpoint (TPPS/2 IBM Trackpoint)

Expected result:
Cursor could be controlled smoothly by using the trackpoint.

Actual result:
Cursor jumping around, if try to move it vertically / horizontally, it will move toward that direction and jumping in a zig-zag pattern. 

Please find attachment for xinput list-props, xev and evtest result.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.8.0-29-generic 3.8.0-29.42~precise1 [modified: boot/vmlinuz-3.8.0-29-generic]
ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
Uname: Linux 3.8.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
Date: Wed Sep 18 04:06:34 2013
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-lts-raring
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Anthony Wong (anthonywong)
         Status: New


** Tags: 201301-12655 amd64 apport-bug blocks-hwcert blocks-hwcert-enablement precise running-unity taipei-lab
-- 
[Lenovo X230s] Jumpy coursor with TPPS/2 IBM Trackpoint
https://bugs.launchpad.net/bugs/1226999
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