Program not showing up on Monitor
 

Hey,

so I'm using DisplayLink for a USB Monitor (Krämer TFT-V-800), but when I try to run my program (written with QT, if that helps), it doesn't show up on the monitor. When I try to click anything else I can't (because the app is fullscreen), and when I open the task manager the process is displayed there, so it is as if the application is running at 0 opacity. The weird thing is, everytime I change some setting, i.e. making the taskbar disappear automatically, the app works again, but only the one time.After that, I can't see it again.

Does anyone know, what may be the problem?

Thanks in advance