QtDesktop and workspace switch under GNOME

malos

Hi,

I am using QtDesktop components with Qt 4.8.

I have 2 qml files written as follows
Toto.qml
@import QtQuick 1.1
import QtDesktop 0.1

ApplicationWindow {
id: toto
width: 200
height: 200
visible : true

  Text {
  id: text
  anchors.fill: parent
  text: "toto"
  }

Tutu {
id:tutu
}
}@

and Tutu.qml
@import QtQuick 1.1
import QtDesktop 0.1

ApplicationWindow {
id: tutu
width: 200
height: 200
visible : true

  Text {
  id: text
  anchors.fill: parent
  text: "tutu"
  }

}
@

The goal is to have 2 independent windows managed by the same process, running qmldesktopviewer Toto.qml works fine.
But when I switch workspace and then back to the original workspace, I have only 1 window displayed.

Using xwininfo, I can see that the other window is in 'UnmappedState'.
Debugging qapplication_x11.cpp, I can see that

when switching wspace 1 to 2, there are 2 UnmapNotify events , one for each window
when switching from wspace 2 to 1, there only 1 MapNotify event, for firstly created window Toto

I do not understand why only one MapNotify event is generated when switching back.
Does anyone have an idea why this is happening?

Any hint very wellcome.

Thks