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QScreen with different graphics cards || QScreen and Xinerama?

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Hi there, I just have the following problem: I have a machine with two nvidia cards and running a Xubuntu (11.10). Now what i am trying to do is spawn a window on my extended screen which is connected to the secondary graphics card. QGuiApplication::screens().size() returns 2 for my two screens which is correct so far. My secondary graphics card is running in a seperate X server (which is the usual way to do that i guess). But if i create my window as follows QWindow w(QGuiApplication::screens()->at(1)); w->show(); The whole application crashes without any message! (is that normal?) Now i am using Xinerama to have it more “Windows like”. But now QGuiApplication::screens()->size() returns 1, which is not correct in my oppinion. Is there another way to have access to the QScreen which represents the screen connected to my second graphics card? I also tried the virtualSiblings thing of QScreen but there is only one instance and it is the same as my primary screen! HELP? Thanks

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