Today on Armbian Buster, I installed rbfeeder and during installation said "yes" when was asked "do you want to install dump978-rb?".
After installation I found dump978-rb has failed to run:
$ sudo systemctl stsatus dump978-rb
... ....
... ....
ExecStart=/usr/share/dump978-rb/start-dump978-rb (code=exited, status=2)
Checked by directly starting dump978-rb
$ /usr/bin/dump978-rb --sdr driver=rtlsdr,serial=00000401 --sdr-auto-gain --format CS8 --raw-port 30978 --json-port 28380
.... ....
Configuration error: No matching SoapySDR device found (cause:SoapySDR::Device::make() no match)
Solved by installing missing soapysdr package, and then restarting dump978-rb
$ sudo apt install soapysdr-module-rtlsdr
$ sudo systemctl restart dump978-rb
Checked Status, working OK now.
$ sudo systemctl status dump978-rb
● dump978-rb.service - dump978 ADS-B UAT receiver
Loaded: loaded (/lib/systemd/system/dump978-rb.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2020-02-18 02:14:25 UTC; 1s ago
Docs: https://www.radarbox.com
Main PID: 9885 (dump978-rb)
Tasks: 4 (limit: 2068)
Memory: 7.8M
CGroup: /system.slice/dump978-rb.service
└─9885 /usr/bin/dump978-rb --sdr driver=rtlsdr,serial=00000401 --sdr-auto-gain --format CS8 --raw-po
Feb 18 02:14:25 orangepipc dump978-rb[9885]: Found Rafael Micro R820T tuner
Feb 18 02:14:25 orangepipc dump978-rb[9885]: Reattached kernel driver
Feb 18 02:14:26 orangepipc dump978-rb[9885]: Detached kernel driver
Feb 18 02:14:26 orangepipc dump978-rb[9885]: Found Rafael Micro R820T tuner
Feb 18 02:14:26 orangepipc dump978-rb[9885]: Exact sample rate is: 2083333.135571 Hz
Feb 18 02:14:26 orangepipc dump978-rb[9885]: [R82XX] PLL not locked!
Feb 18 02:14:26 orangepipc dump978-rb[9885]: SoapySDR: using automatic gain
Feb 18 02:14:26 orangepipc dump978-rb[9885]: SoapySDR: using stream setting buffsize=262144
Feb 18 02:14:26 orangepipc dump978-rb[9885]: Allocating 15 zero-copy buffers
Feb 18 02:14:26 orangepipc dump978-rb[9885]: Detected Kernel usbfs mmap() bug, falling back to buffers in users