Support for Lenovo new TrackPad (ClickPad)

[Yung Shen]

*This bug is under developing

Affected model:

L440 - with Ubuntu release: 12.04.5
w540 - with Ubuntu release: 12.04.5
X240
T440p with Ubuntu release: 14.10(daily), issue reported separately here with this bug #1383157

Description:

The Lenovo new TrackPad since 2014 starting to unify buttons into ClickPad, but in most case for now, upper middle scroll(selection) and upper left click, in generally it is not effecting normal use, however it is a trouble for user who use Trackpoint(Pointing Stick), which makes it useless since there is no wait to scroll with TrackPoint.

Steps to reproduce:

1. Open any webpage
2. Trying to scroll page with TrackPoint

1. Open any textfile with any editors
2. Trying to select and copy some text while using TrackPoint

Actual result:

Users need to move their hands off the keyboard and use the bottom of touchpad to perform actions all over again.

Expected results:

5 buttons on new TrackPad should works as expected.

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Additional information:

New Trackpad should be supported in Utopic according to this bug:
https://bugs.launchpad.net/ubuntu/+source/libevdev/+bug/1294515

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Reference information about the unified touchpad:

ThinkPad TrackPad features promote page:
http://shop.lenovo.com/us/en/laptops/thinkpad/trackpad/

Synaptics ClickPad solution:
http://www.synaptics.com/en/clickpad.php

[Launchpad Janitor (janitor)]

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