If a system is known to be unable to provide vsync-based throttling, the only option before Qt 6.4 was to use the basic render loop, by manually setting QSG_RENDER_LOOP=basic in the environment before running the application. Before following the next steps, please make sure you have installed the Microsoft Visual C++ x64 redistributable. Most PCs will have this already installed, but on some fresh installs this may not be the case. Installing Zadig drivers The scene graph uses heuristics to figure out how large the atlas should be and what the size threshold for being entered into the atlas is. If different values are needed, it is possible to override them using the environment variables QSG_ATLAS_WIDTH=[width], QSG_ATLAS_HEIGHT=[height] and QSG_ATLAS_SIZE_LIMIT=[size]. Changing these values will mostly be interesting for platform vendors. Batch Roots My dongle gets extremely hot and stops working, or doesn't work at all. USB current measures well above 0.3A. This appears to be a bug with SDR# or Windows. The solution right now is to simply turn display sleep off.

There are two render loop variants available: basic, and threaded. basic is single-threaded, while threaded performs scene graph rendering on a dedicated thread. Qt attempts to choose a suitable loop based on the platform and possibly the graphics drivers in use. When this is not satisfactory, or for testing purposes, the environment variable QSG_RENDER_LOOP can be used to force the usage of a given loop. To verify which render loop is in use, enable the qt.scenegraph.general logging category. Threaded Render Loop ('threaded') Press the Play button (the right facing triangle in the top left of the program). Your RTL-SDR software radio should now be set up and ready to use! If everything has worked you should be able to start tuning to frequencies. First, if you already have some other drivers installed, please purge them from your system using the following commands: sudo apt purge Focus on your target audience. Only in this case, you will represent the information the right way.QSGSimpleRectNode - a QSGGeometryNode subclass which defines a rectangular geometry with a solid color material.

When mixing custom OpenGL rendering with the scene graph, it is important the application does not leave the OpenGL context in a state with buffers bound, attributes enabled, special values in the z-buffer or stencil-buffer or similar. Doing so can result in unpredictable behavior. The default scene graph renderer works within these limitations and will try to merge individual primitives together into batches while preserving the exact same visual result. The result is fewer OpenGL state changes and a minimal amount of draw calls, resulting in optimal performance. Opaque PrimitivesAnother thing to try may be to disable Windows automatic driver installation. Instructions for disabling this can be found here. This error also sometimes occurs after the computer has been suspended - to fix it simply disconnect and reconnect the dongle. If you continue to have issues please feel free to post in the troubleshooting section of our Forums. Alternative Software Unfortunately some cheap USB 3.0 controllers are buggy and don't work with some USB 2.0 devices. Generally, USB 3.0 works fine with the RTL-SDR, but there are some controllers that will just not recognize the dongle. In this case use a USB 2.0 port instead.