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[Daniel d'Andrada <daniel.dandrada@xxxxxxxxxxxxx>]

Attaching detailed xserver log. The following steps were taken:

1- sudo restart lightdm (to restart the X server. so that de have a clean slate)
2- run a very simple qml app with qmlscene
3- tapped on that qmlscene window (touch id 1)
4- tapped on the desktop area (nautilus) (touch id 2)
5- sudo stop lightdm

>From the logs you can see that no pointer emulation was done for touch
id 2 because xserver still thinks that touch id 1 is active.

** Attachment added: "xorg_debug.zip"
   https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/+attachment/4106287/+files/xorg_debug.zip

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https://bugs.launchpad.net/bugs/1307701

Title:
  xserver mouse pointer emulation from touch breaks with QML app.

Status in OEM Priority Project:
  New
Status in OEM Priority Project trusty series:
  Triaged
Status in “unity” package in Ubuntu:
  In Progress
Status in “xorg-server” package in Ubuntu:
  New

Bug description:
  When running an SDK app on the desktop, it's not possible to use the
  touchscreen to move windows, use the launcher, etc. The SDK app seems
  to consume all touchscreen events.

  To reproduce:
  1) On a desktop/laptop with a touchscreen (I am using a Dell XPS13), install 14.04 and check that the touchscreen works for moving windows
  2) Install the camera-app package from universe (I have 2.9.1+14.04.20140331-0ubuntu1)
  3) Launch the camera app
  4) Touch once inside the camera-app window
  5) Use the touchscreen to drag the camera-app window

  Expected results:
  You can move the camera-app window using the touchscreen

  Actual results:
  You cannot move the camera-app window, or perform any other touch tasks in unity, with the touchscreen

  This only affects touchscreen input - mouse/touchpad input is not
  affected

  This affects all apps written with the SDK (I tried camera-app,
  gallery-app, reminders-app). It's 100% reproducible.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.0+14.04.20140411-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu2
  Architecture: amd64
  CompizPlugins: [core,commands,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  CurrentDesktop: Unity
  Date: Mon Apr 14 14:59:09 2014
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20130203-1
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-12-02 (132 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
  SourcePackage: unity
  UpgradeStatus: Upgraded to trusty on 2014-02-12 (61 days ago)

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