I have a mysterious behavior with a Qt Widgets application. It runs fine when this application is started directly on the target system (Beckhoff PC with Windows) or on my development pc. The same application runs on several identical target systems. If the application is started via the Windows Remote Desktop, then on some systems it takes a very long time (approx. 10 minutes) until the QT Widgets application is loaded and started. It is as if the application is frozen.
The application only uses the standard elements (buttons, labels, text inputs, dropdowns etc).
I have no idea what I could change in the code. Does anyone have an idea if this could have something to do with the remote desktop?
Could it have something to do with OpenGL? Is this a known issue? Is there a known solution for this?
Starting the app directly on the target system works fine. I would expect the same behavior when starting the app via remote desktop.