QtWidget - Multi Monitor - Single Desktop - X_CopyArea Bug under Ubuntu

I can't figure out what's going on with this Bug i got:

Code:

---

X Error: BadMatch (invalid parameter attributes) 8
  Major opcode: 62 (X_CopyArea)
  Resource id:  0x4e00004

---

I wanted to display two widgets on two Monitors with one Application.
I configured my Target with the following screen Configuration (Single Desktop, Multiple Monitors):
Attachment 10137

Weird is the fact that it works for an old X-Server under Suse. Under Ubuntu it doesn't.

Here are source and X-Versions

Btw: I must use this config (the must be no virtual Desktop on two screens), and i just want to get why it doesn't work.
- Same dirver
- so qt-bug?



Attachment 10136

Code:

---

#include <qapplication.h>
#include <qwidget.h>
#include <qdesktopwidget.h>
 
int
main(int argc, char *argv[])
{
  QApplication app(argc, argv);
  QWidget widgetScreenZero(qApp->desktop()->screen(0));
  QWidget widgetScreenOne(qApp->desktop()->screen(1));
  widgetScreenZero.setStyleSheet("background-image: url(:/images/zero.svg);");l
  widgetScreenOne.setStyleSheet("background-image: url(:/images/one.svg);");
  widgetScreenOne.show();
  widgetScreenZero.show();
  return app.exec();
}

---

Suse:
X.Org X Server 1.8.0
Release Date: 2010-04-02
X Protocol Version 11, Revision 0
Build Operating System: openSUSE SUSE LINUX
Current Operating System: Linux ws17 2.6.34-12-desktop #1 SMP PREEMPT 2010-06-29 02:39:08 +0200 i686
Kernel command line: root=/dev/disk/by-id/ata-KINGSTON_SV100S264G_64GB60076281-part1 resume=/dev/disk/by-id/ata-KINGSTON_SV100S264G_64GB60076281-part2 splash=silent quiet crashkernel= vga=0x345
Build Date: 05 July 2010 09:26:26PM
Current version of pixman: 0.18.0
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.



Ubuntu:
X.Org X Server 1.14.5
Release Date: 2013-12-12
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.42-37-generic i686 Ubuntu
Current Operating System: Linux ws25 3.11.0-15-generic #25~precise1-Ubuntu SMP Thu Jan 30 17:42:40 UTC 2014 i686
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=ce61481b-be95-4a6b-a5db-1f154dc14cd6 ro quiet splash vt.handoff=7
Build Date: 06 January 2014 01:41:06PM
xorg-server 2:1.14.5-1ubuntu2~saucy1~precise2 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.30.2
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.