https://forum.qt.io/topic/137896/qt5-qopenglcontext-swapbuffers-called-with-non-exposed-window-behavior-is-undefined
Qt5 : QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined | Qt Forum
Jul 15, 2022 - I have the following code from KDAB via the qt3d repository. When I compile and run it (Ubuntu 18.04), I get the swapBuffers() message. What do I need to do ...