LimeSDR-mini fails to set RX input rate

[Dan Christian]

I have a LimeSDR-mini and it works fine with gnuradio and pothos; but I wanted to try gqrx.  I'm running Ubuntu 19.10 and built from source earlier today.

Any tips on getting gqrx working with LimeSDR?

Here is what I get, when I select the LimeSDR-mini from the device list.  I've tried lower sample rates than the default 5m, but everything seems to fail:

$ gqrx -r
gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.13.4
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp  
Resampling audio 96000 -> 48000
BookmarksFile is /home/dchristian/.config/gqrx/bookmarks.csv
[INFO] [UHD] linux; GNU C++ version 8.2.0; Boost_106700; UHD_3.13.1.0-3

RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (hw:0,0), Device or resource busy.


RtApiAlsa::getDeviceInfo: pcm device (hw:1,0) data format not supported by RtAudio.


RtApiAlsa::getDeviceInfo: pcm device (hw:1,1) data format not supported by RtAudio.

gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.13.4
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp  
[INFO] Make connection: 'LimeSDR Mini [USB 3.0] 1D53BA19C07646'
[INFO] Reference clock 40.00 MHz
[INFO] Device name: LimeSDR-Mini
[INFO] Reference: 40 MHz
[INFO] LMS7002M calibration values caching Disable

FATAL: SoapyLMS7::setupStream() failed:  

Trying to fill up 1 missing channel(s) with null source(s).
This is being done to prevent the application from crashing
due to gnuradio bug #528.


Failed to set RX input rate to 5e+06
Your device may not be working properly.

libusb: warning [libusb_exit] application left some devices open

Here is what  SoapySDRUtil finds:

$ SoapySDRUtil --find
######################################################
##     Soapy SDR -- the SDR abstraction library     ##
######################################################

Found device 0
 addr = 24607:1027
 driver = lime
 label = LimeSDR Mini [USB 3.0] 1D53BA19C07646
 media = USB 3.0
 module = FT601
 name = LimeSDR Mini
 serial = 1D53BA19C07646