Hi, I´m trying to get my FUNcube Dongle (V1.O NOT the Pro+) to work on Ubuntu 20.04.1 LTS but it doesn´t work. On a rasberry pi4 (Raspbian 10) the dongle is working in gnuradio-companion together with the osmocom-source. So the hardware seems to work. On Ubuntu I get following errors: 1. Gnuradio-companion as "osmocom Source" with device string "fcd=0": Executing: /usr/bin/python3 -u /home/reald/grc/osmocomsrc_fcd.py gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.1.0 built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp Using FUNcube Dongle V1.0 (hw:2) gr::log :INFO: audio source - Audio source arch: alsa gr::log :INFO: fcd0 - Audio device hw:2 opened gr::log :INFO: fcd_control0 - FunCube Dongle  V1.0 initialized. gr::log :INFO: fcd_control0 - Dongle: FCDAPP 18.10 gr::log :INFO: fcd_control0 - LNA gain set to:      20 Traceback (most recent call last):   File "/home/reald/grc/osmocomsrc_fcd.py", line 275, in <module>     main()   File "/home/reald/grc/osmocomsrc_fcd.py", line 253, in main     tb = top_block_cls()   File "/home/reald/grc/osmocomsrc_fcd.py", line 145, in __init__     self.osmosdr_source_0 = osmosdr.source(   File "/usr/lib/python3/dist-packages/osmosdr/osmosdr_swig.py", line 1074, in make     return _osmosdr_swig.source_make(*args, **kwargs) RuntimeError: boost::too_many_args: format-string referred to fewer arguments than were passed 2. GQRX When configuring gqrx the dongle is listed. But after every start of gqrx the message "boost::too_many_args: format-string referred to fewer arguments then were passed - Please select another device" appears and the dongle cannot be used. 3. osmocom_fft -a fcd=0 gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.1.0 built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp Using FUNcube Dongle V1.0 (hw:2) gr::log :INFO: audio source - Audio source arch: alsa gr::log :INFO: fcd0 - Audio device hw:2 opened gr::log :INFO: fcd_control0 - FunCube Dongle  V1.0 initialized. gr::log :INFO: fcd_control0 - Dongle: FCDAPP 18.10 gr::log :INFO: fcd_control0 - LNA gain set to:      20 Couldn't instanciate source (no device present?). The device itself is found: $ lsusb Bus 001 Device 009: ID 04d8:fb56 Microchip Technology, Inc. FUNcube Dongle V1.0 $ dmesg [10627.256845] usb 1-9: new full-speed USB device number 9 using xhci_hcd [10627.408263] usb 1-9: New USB device found, idVendor=04d8, idProduct=fb56, bcdDevice= 0.02 [10627.408268] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [10627.408272] usb 1-9: Product: FUNcube Dongle V1.0 [10627.408275] usb 1-9: Manufacturer: Hanlincrest Ltd. [10627.416513] hid-generic 0003:04D8:FB56.0007: hiddev1,hidraw3: USB HID v1.11 Device [Hanlincrest Ltd.          FUNcube Dongle V1.0  ] on usb-0000:00:14.0-9/input2 [10627.849214] usb 1-5.1.1: reset high-speed USB device number 8 using xhci_hcd [10628.703275] parport0: no more devices allowed [10628.703283] ppdev0: failed to register device! Package: gr-osmosdr Version: 0.2.0-2 Package: libosmosdr0 Version: 0.1.8.effcaa7-7 Any ideas? Thanks for your help! Regards Dennis