GNU Radio on the Raspberry Pi 2

Having followed the instructions over here, everything worked except that the FFT plot diagrams were blank. I've got the following error message:

libGL error: failed to load driver: swrast

It was solved by:

sudo apt-get install libgl1-mesa-swx11


Thank you András! It works, but are widgets not responding. Do you know what is the solution?


Hi Tamás,

Similar thing happened to me when I built a test flowgraph with a signal/noise source, and forgot to use the Throttle block, which would limit the number of samples going through it. Then it took 100% of the CPU to execute the flowgraph, and the UI froze.

Note that you don't have to use the Throttle block if you use real receiver hardware (e.g. RTL-SDR).



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