Pi 4 Raspian gqrx controlport disabled pulseaudio error

juro Znirp

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Oct 20, 2019, 8:58:30 AM10/20/19

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Hello,

I installed gqrx v 2.11.5 on Raspberry Pi 4 with Raspian OS with add/remove software.Starting gqrx following error occurs:

- qt5ct: using gq5ct plugin

- Controlport disabled

-"Pulseaudio error: access denied"

As an alternativ, gqrx was installed via console with the same result.

How can I resolve this problem?

Best Regards

Juro

juro Znirp

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Oct 20, 2019, 11:19:43 AM10/20/19

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Hi,

in the meantime I changed from Raspbian Stretch to Buster and got again errors. It says, that the controlpart of Funcube cannot be found. I checked Funcube pro + under windows and everything works without problem. Here the complete output of the error:

pi@raspberrypi:~ $ gqrx

qt5ct: using qt5ct plugin

Controlport disabled

No user supplied config file. Using "default.conf"

qt5ct: D-Bus global menu: no

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

FM demod gain: 3.05577

Resampling audio 96000 -> 48000

IQ DCR alpha: 1.04166e-05

Using audio backend: auto

BookmarksFile is /home/pi/.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:0,1), Das Gerät oder die Ressource ist belegt.

RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (hw:0,2), Das Gerät oder die Ressource ist belegt.

getDeviceList : Available input devices:

"FUNcube Dongle V2.0"

"RFSPACE SDR-IQ Receiver"

"RFSPACE SDR-IP Receiver"

"RFSPACE NetSDR Receiver"

"RFSPACE Cloud-IQ Receiver"

"hw:FUNcube Dongle V2.0,0"

"default"

"RTL-SDR Spectrum Server"

"Red Pitaya Transceiver Server"

"Complex Sampled (IQ) File"

Loading configuration from: "default.conf"

Configuration file: "/home/pi/.config/gqrx/default.conf"

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

Using FUNcube Dongle V2.0 (hw:1)

gr::log :INFO: audio source - Audio source arch: alsa

Opened: hw:1

FATAL: FunCube Dongle V2.0 soundcard found but not controlpart.

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.

********************

No change in output device:

old:

new:

Failed to set RX input rate to 192000

Your device may not be working properly.

IQ DCR samp_rate: 192000

IQ DCR alpha: 5.20831e-06

Changing NB_RX quad rate: 96000 -> 192000

Requested sample rate: 192000

Actual sample rate : "192000.000000"

New FFT rate: 25 Hz

Requested bandwidth: 0 Hz

Actual bandwidth : 0 Hz

setFreqCorr : 0 ppm

New LNB LO: 0 Hz

updateHWFrequencyRange failed fetching new hardware frequency range

New mode index: 7

Filter preset for mode 7 LO: 100 HI: 2800

Generating taps for new filter LO:100 HI:2800 TW:540 Taps: 429

setFftRate to "25 fps"

New FFT rate: 25 Hz

setFftSize to "8192"

New FFT rate: 25 Hz

Generating taps for new filter LO:100 HI:2800 TW:540 Taps: 429

New FFT rate: 25 Hz

No audio FFT data.

New FFT rate: 25 Hz

saveSettings *** FIXME_ SQL on/off

New FFT rate: 25 Hz

Any Help is appreciated.

Best Regards

Juro

juro Znirp

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Nov 8, 2019, 12:57:11 PM11/8/19

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HI,

in the meantime I got my Gqrx running on Raspberry Pi 4 without any problems by myself. Following changes were necessary:

- activate pulseaudio -D

- output sound on Raspberry audio jack

- on raspian desktop: speaker output changed to analog (hdmi didn´t work, as I am using an old monitor with an converter to hdmi)

- Gqrx receiver options: gain to more or less 8dB.

Saludos

Juro

Am Sonntag, 20. Oktober 2019 14:58:30 UTC+2 schrieb juro Znirp:

Keeta

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Nov 10, 2019, 2:25:21 AM11/10/19

to Gqrx SDR

I have almost the same problem. Pulseaudio causing me lots of grief. I tried what you said with restarting pulseaudio -d but it did nothing.

Each time i try to use pulseaudio it disables/locks my volume at only 2% on my hdmi and 3.5mm jack. Any attempt to increase the volume disables them.

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