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[Roman Lenskij <967399@xxxxxxxxxxxxxxxxxx>]

I've already posted my solution for this in Bug #1070207 which seems to
be a duplicate of this bug.

No need to recompile the kernel, just use DKMS :)

Can confirm that this bug still exists on Lenovo L430/L530 with Ubuntu
14.10

https://drive.google.com/file/d/0ByR4ekc5XtmPTWxQUkdZWkt2YXM/view?usp=sharing

The link points to  a dkms tar.gz with a backported elantech driver from
the current 3.18 kernel (that has the the fix for the issue included).

I call it "backported" as it was _slightly_ changed.
__set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit); had to be commented out in elantech.c as kernel 3.16 doesn't support the INPUT_PROP_POINTING_STICK bit.

Apart from elantech.c and elantech.h everything else was coppied from
the latest 3.16 ubuntu kernel sources.

This has been tested with ubuntu 14.10, *should* be compatible with
ubuntu 14.04 (not tested)

TL;DR:
Download https://drive.google.com/file/d/0ByR4ekc5XtmPTWxQUkdZWkt2YXM/view?usp=sharing
sudo apt-get install dkms
sudo dkms ldtarball psmouse-elantech-3-18.tar.gz
sudo dkms install -m psmouse -v elantech-3-18
sudo rmmod psmouse
sudo modprobe psmouse

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https://bugs.launchpad.net/bugs/967399

Title:
  [11.10] Elantech trackpoint does not work Lenovo

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Precise:
  Fix Released

Bug description:
  Title: trackpoint does not function

  Summary: trackpoint does not function

  Steps:
  1. log into desktop
  2. use trackpoint and trackpoint buttons

  Expected results: laptop responds to trackpoint and trackpoint buttons
  being pressed

  Actual results: nothing happens
  Manufacturer: LENOVO

  WORKAROUND: sudo modprobe proto=exps enables the trackpoint and
  touchpad, but user will lose multi-touch functionality.

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