installing gqrx on debian wheezy

[Suryo Bintoro]

Hello,

I installed gqrx (2.3.1) directly from Debian sid repository (apt-get installed).  Installation completed without error message although it installed tons of lib/dependencies (700+MB).

When i finally tried to start it from terminal, it just wont start and gave crash detected dialog box : "Gqrx has detected problems with the current configuration. Loading the configuration again could cause the application to crash. Do you want to edit the setting ?"  and it hang when i responded either Y/N and i had to terminate (Ctrl-C) to quit.

Not sure if i missed something during installation, 

Any help will be appreciated please..

Best Regards

[Suryo Bintoro]

ups...i forgot to mention, i installed it on my old r50e laptop (centrino)

[Alexandru Csete]

You can try to start gqrx from the terminal and see what error message
it prints.
I am sort of assuming that you have a supported hardware device
attached to your computer before starting gqrx.

I have to point out though that gqrx will not run well on old
computers, in particular if it is single core.

Alex

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[Suryo Bintoro]

Hello Alex,

I'm using unbranded DVB-T RTL2823U dongle. It works well with my other SDR station (SDR# on windows).
Here the terminal output :

suryo@R50e:~$ gqrx
linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown

Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected
Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected
gr-osmosdr 0.1.3 (0.1.3) gnuradio 3.7.5
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy
Using Volk machine: sse2_32_mmx_orc
pulseaudio/pa_sink.cc: pa_simple_new() failed: Connection refused
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600
Could not resolve property : pattern10600

Best regards

Suryo

[Alexandru Csete]

On Wed, Feb 11, 2015 at 6:12 PM, Suryo Bintoro <surj...@gmail.com> wrote:
> Hello Alex,
>
> I'm using unbranded DVB-T RTL2823U dongle. It works well with my other SDR
> station (SDR# on windows).
> Here the terminal output :
>
> suryo@R50e:~$ gqrx
> linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown
>
> Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103:
> Having multiple values in <test> isn't supported and may not work as
> expected
> Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138:
> Having multiple values in <test> isn't supported and may not work as
> expected
> gr-osmosdr 0.1.3 (0.1.3) gnuradio 3.7.5
> built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf
> rfspace airspy
> Using Volk machine: sse2_32_mmx_orc
> pulseaudio/pa_sink.cc: pa_simple_new() failed: Connection refused

Well, this is the error. Gqrx needs pulseaudio installed and running.
There is an option to compile it with alsa support instead but then
you need to build gqrx yourself.

Alex

[Suryo Bintoro]

Thanks to point out Alex, im wondering why I dont have pulseaudio ready in my wheezy. Ill try to install the package tonight. Shall I look for certain release ?

Regards

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[Robin Gape]

Suryo,

personally, I haven't installed an actual Debian desktop system for a while, but the reasons for Pulseaudio being absent might be:

• you originally performed a server installation
• you originally installed a desktop, but there was a configuration option whose effect was to exclude Pulseaudio
• you originally installed a desktop,and chose specifically not to use Pulseaudio, because it didn't seem to be necessary! (ALSA on its own works fine for many purposes)
• Pulseaudio has been installed, but for some reason the Pulseaudio dæmon is not being started at boot time

The command ps aux |grep pulse should give you something similar to:

name     2468  1.5  0.2 511572 11508 ?        S<l  Jan31 269:54 /usr/bin/pulseaudio --start --log-target=syslog

Ubuntu uses version 4 of Pulseaudio, though the latest release is version 5. Generally, installing the latest version should give the most hassle-free results.

Good luck with your exploration,

Robin, G8DQX

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[Suryo Bintoro]

Hello Robin, Alex

I installed my debian about 7 months ago on my old laptop, replacing original shipped OS (was Windows XP home).I configured it as desktop with the only server i installed was the cups, with xfce.
Good news is, last night my gqrx is working after i installed pulseaudio (rel 5), the one available on repo (sid).
at first i was a bit dissapointed with the sound quality, First trial was tuning to strongest signal picked up by my small telescopic antenna (stolen from my son's broken rc car): commercial FM band. spectrum and waterfall is reproduce very well on screen but with fluttering sound., and quality little bit improved when i select mono WFM instead of stereo, after that, i tried for NBFM on 2m band, and guess what, audio quality is a lot better, my be not perfect but my ear could not distinguish the audio quality when i tried to compare it the same channel with my SDR# on pentium core i3. Quick snapshot with top command : gqrx took around 75-80% of CPU load (NBFM), and 95% for WBFM. So i guess the fluttering sound on WBFM is due to my processor computing power.
Overall i'm quite happy with the result, well, i will not use this for listening my FM stations anyway.

Any other opinion regarding the cause of fluttering sound, that i may can improve ?

Suryo

[Robin Gape]

Suryo,

I've run GQRX on a twin-core 1.2GHz processor with 2GB RAM quite nicely (using a funcube dongle pro plus (FCDPP)), but you haven't said what processor, clock speed and RAM your ex-XP laptop has. However, if the processor usage is at 95%, that's pretty much run out of steam. WBFM will, in priniple, require more processing than NBFM, since, at some point in the processing pipeline, calculations are being performed at a greater rate. Fewer samples/second ⇒ fewer calculations/second, and less demand on the CPU!

I don't have one of the RTL dongles, but I think that you may be able to try changing the sample rate from the dongle to reduce the processor load.

HTH

Robin, G8DQX

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[Calvin Kutemeier]

I just installed gqrx and dump1090 on an Acer C710 Chromebook running Chrubuntu 14.04 with the Unity desktop.  Google Full Circle Magazine (FCM) issue # 93.  I was surprised how easy it was. 


See the attachment for the relevant two pages of the magazine.  FCM has lots of articles about other linux programs.  It is a good resource.