I set up Piaware on a Raspberry Pi 4 and had it running without problems. The SDR was a NooElec Smart. I then replaced the NooElec with an RTL dongle but nothing worked. So I put the NooElec back but still nothing worked. I have subsequently flashed new SD cards and reinstalled Piaware several times. I had it running briefly yesterday but it stopped after a few minutes and now I can’t get it going again despite reinstalling everything. The Pi works fine if the SDR dongle is not connected, I can connect with it over wifi without problems and it is running. The problem comes when I connect the SDR as it locks the Pi and I can no longer connect to it. Starting the Pi with the SDR already inserted makes no difference. I have tried with a different NooElec Smart (I have two) and the same happens as it does when I replace the Pi 4 with the Pi 2 I used when I first set up PiAware - which worked at the time.
Has anyone any idea how inserting an RTL dongle could cause such problems as everything went wrong after I did this? Could it have somehow corrupted the firmware on the NooElecs?