Unsolved QDockWidgets in Linux cannot float outside of screen geometry

[allopis]

My program is running on linux / QT 4.8.7

If I try to move a QDockWidget partially out of the screen by dragging from the title bar, it won't move past the border of the screen, it stops moving there.

However, if I alt click and drag I can move it partially out (looks like probably the window manager is circumventing qt).

Is this a bug? can I patch the source of qdockwidget to allow it to move partially out of the screen?

Thanks

[SGaist]

Hi and welcome to devnet,

That's likely coming from your window manager.

Which is it ?
Do you have the same behaviour with Qt 5 ?

[allopis]

I am using centOS 6.10, my windows manager is metacity 2.28.0. I haven't tried with qt 5 yet, will try that now