Full screen makes the screen flickers on Windows 8

bunjee207

Grettings Qt community,

For some reason when going full screen (or resizing the window to the entire screen) the screen flickers: it goes to black for a second.

I'm on Windows 8 and it does not seem to happen on an application like chromium for instance.

Is there some kind of flag to disable that behavior ?

Thanks ♥.

mrjj

Hi and greetings
That sounds a bit odd. Its not expected and there is no flag.
Are we talking QML or QWidgets and what version of Qt?
Anything openGl ?

bunjee207

We are talking QML + Frameless Window.

Here is a related post: https://forum.qt.io/topic/68132/flicker-with-qopenglwidget-when-fullscreen-and-frameless-window.

mrjj

Ok seems to be a plain bug.

bunjee207

This is the workaround I'm using with Qt 4:

#ifdef Q_OS_WIN
    // FIXME Windows: Workaround for opengl full screen flicker.
    q->setViewportMargins(0, 0, -1, 0);
#endif

Is there something equivalent with the QQuickWindow ?

Note: As far as I can tell this is related to Windows 8 + OpenGL + double buffering. I don't have the issue when using single buffering.