fix handling of mx4 touch screen

[Andreas Pokorny]

The mx4 touch screen sends a BTN_TOOL_FINGER key event during the touch down and up.. This interferes with position tracking inside libinput and leads to invalid positions being reported and in some cases jumping of the position just before the release of a touch contact.

There is a fix posted at the libinput mailinglist, but those have not been applied yet. (Peter is on vacation).

Latest update of the touch screen patches (these will compensate the initial jumping of touch contacts , but not fix the mx4 issue)
http://lists.freedesktop.org/archives/wayland-devel/2015-November/025159.html
The last step, the actual mx4 fix:
http://lists.freedesktop.org/archives/wayland-devel/2015-September/024171.html

Editor node: ^ Updated the patches for the most current version v8 on top of 1.1.0 of libinput.

[Andreas Pokorny (andreas-pokorny)]

This bug is mostly relevant for the phone images. So whenever released I would forward it to the current set of phone-overlays..

[Launchpad Janitor (janitor)]

This bug was fixed in the package libinput - 1.1.0-1ubuntu2

---------------
libinput (1.1.0-1ubuntu2) xenial; urgency=medium

  * touch-point-orientation-size.patch: Updated to v8 from list, but use
    old version for symbols.
  * fix-premature-flushing-of-evdev-event-on-mx4.patch: Added. (LP:
    #1504168)

 -- Timo Aaltonen <email address hidden> Thu, 05 Nov 2015 15:16:20 +0200