Hi there. Im a long time USRP/UHD/GNURadio user. Very familiar with all 3. Im doing my first project with RFNoC using an X310 to showcase its capabilities and add a custom block. I’ve built 2 custom images per the tutorials on the knowledge base. 1 has the core blocks with FFT added (from the knowledge base example) and the second has the fft and fosphor block added. So far the radio->DDC example flowgraph works fine on the base image. When I load the FFT/fosphor image and run the fosphor flowgraph: Radio->DDC->FFT->Fosphor->Streamer->Fosphor Display The display works, but the screen locks up, the size can’t be adjusted, none of the widget controls work (gain, freq) and closing the window/pressing stop in GRC also does nothing. I have to force quit the application or kill -9 to stop it. At very low sample rates (like 1Msps) it can keep up and behave as normal. 5Msps, i'm able to close but have a significant delay before it shuts down. Anything above that runs it into the ground. To me, this behavior feels similar to running a high-rate flowgraph with no throttle or clock source and the GUI gets nuked from all the data coming through.
Any idea how to debug this problem or what might be causing these issues? Is there a way to offer a more detailed explanation of how to use fosphor in the new RFNoC? The only explanation for how to use the newest fosphor that I can find is here: http://ettus.80997.x6.nabble.com/USRP-users-setting-up-gr-fosphor-on-uhd-4-td16532.html My system is the following Ubuntu18.04LTS GNURadio maint-3.8 UHD4.0 gr-ettus master Any thoughts or ideas would be really helpful. Thanks, B
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