Dear Dougie, Thank you the fast answer. If I comment the GPIO functions in my code, the GUI start without problem. If I uncomment the GPIO functions and run it with gksudo, then the GPIO functions works during the start (__init__) ,but unfortunatelly I see only the main frame. The full content is mi...

Dear Forumers, (First of all I'm beginner in Pi ;) therefore the solution can be easy, but unfortunatelly for me it seems too difficult.) So, I need support regarding the following problem: I trying the Pi GPIO functions (blinking, pwm RGB Led) and I created a GUI for it in Qt. The problem: If I wan...