Just received new HackRF One, and am new to SDR. I have installed gnuradio and Gqrx. Both installations went successfully AFAICT.
Following Michael Ossmann's tutorial I constructed a flow graph in gnuradio-companion, with the exception of using QT GUI components (WX components did not appear in the menus. From what I read WX components are deprecated anyway.)
When running my gnuradio-companion flow graph or running Gqrx, I get similar results. The observations below apply to both gnuradio companion and Gqrx. I have tried all experiments on both applications: