Web player fullscreen displays only a blackscreen

I have searched all around, but haven't find any solution for this. I have a new laptop and when I try to go full screen while watching any online video, I can see only a black screen. It is the same for flash and html5 player and this problem occures in any browser.

I have two video cards (integrated and nvidia) and two monitors.

I already tried to:

• disable hardware acceleration for a flash player
• update display drivers
• disable all plugins

Thanks for any help.