[Bug 1007847] [NEW] qml pincharea doesn't work with opengl, works good otherwise

[Lorenzo]

Public bug reported:

Hi,

I found a strange behaviour with Nokia QT pincharea / gestures
recognization.

I have a Intel i3(amd64) and a Touchscreen monitor workin with Enac
multitouch-hid.

I have a ubuntu 12.04 with xorg, utouch and QT.

I need multitouch support (pinch recognization) in Qt Quick,
but I think that utouch-qml doesn't recognize pinch movement very well, so I'd like to go with the embedded
PinchArea in QT4.8 (http://qt-project.org/doc/qt-4.8/qml-pincharea-members.html)

.. and It work's very well, but..

when I launch my app with opengl enabled, (with qmlviewer -opengl for
example), It's stops to work!

And I get many of these errors:

Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 83
Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 83
Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 83
Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 83
Got touch without getting TouchBegin for id 82
Got touch without getting TouchBegin for id 82

I make some reseach on google, and I found only some links from ubuntu
so I think there is something with Ubuntu implementation of QT4.8
(https://code.launchpad.net/~utouch-team/ubuntu/natty/qt4-x11/xi2.1/+merge/50952)

It's a ubuntu bug, or something with QT?
What can I do to resolve this?

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: libqt4-declarative 4:4.8.1-0ubuntu4.1
Uname: Linux 3.4.0 x86_64
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Sat Jun  2 17:27:31 2012
ProcEnviron:
 TERM=xterm
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: qt4-x11
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: qt4-x11 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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Title:
  qml pincharea doesn't work with opengl, works good otherwise

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