issue with vtkOpenGLRenderWindow on linux with vtk=9.1

Support
5

OpenGL 4.6 is definitely sufficient for VTK 9.1. To eliminate Qt as a possible source of the segfault, can you try a non-Qt VTK example like the cylinder example?

You can also call renderWindow.ReportCapabilities() after the first Render to get more information about the VTK<->OpenGL connection (assuming that the Render() doesn’t cause a segfault).

    # Render and interact
    renderWindow.Render()
    print(renderWindow.ReportCapabilities())
    # The Start() is only for non-Qt apps
    renderWindowInteractor.Start()