Add support for ForcePads found on HP EliteBook Folio 1040

[Dmitry Torokhov]

SRU Justification:

Impact:
Multi-finger gestures broken on HP EliteBook 1040 laptops that use ForcePads.

Fix:
Please include the following commit from mainline in Ubuntu kernel:

From 5715fc764f7753d464dbe094b5ef9cffa6e479a4 Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <email address hidden>
Date: Sat, 30 Aug 2014 13:51:06 -0700
Subject: Input: synaptics - add support for ForcePads

ForcePads are found on HP EliteBook 1040 laptops. They lack any kind of
physical buttons, instead they generate primary button click when user
presses somewhat hard on the surface of the touchpad. Unfortunately they
also report primary button click whenever there are 2 or more contacts
on the pad, messing up all multi-finger gestures (2-finger scrolling,
multi-finger tapping, etc). To cope with this behavior we introduce a
delay (currently 50 msecs) in reporting primary press in case more
contacts appear.

Cc: <email address hidden>
Reviewed-by: Hans de Goede <email address hidden>
Signed-off-by: Dmitry Torokhov <email address hidden>

Testcase:
Try multi-finger gestures as well as force clicks and observe behavior.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1368444

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

The commit was cc'd to stable, so it should make it's way into Ubuntu through the normal stable update process.

[Philipp Kern (pkern)]

I don't see it in 3.13.11.7 nor in the 3.13.y queue. Are you sure that it'll make it?

[Clement (clement-moulinfrier)]

I have the same bug on utopic, is the correction eventually integrated into the kernel or not? If not, could you please share how you fixed it?
Thanks