Installing gqrx on Fedora 20 32 bit

[jhha...@earthlink.net]

I tried yum install gqrx.  It fails because of a bunch of dependencies
Error: Package: gqrx-2.2.0-4.fc20.i686 (updates)
           Requires: libgnuradio-fft-3.7.2.1.so.0.0.0
Error: Package: gqrx-2.2.0-4.fc20.i686 (updates)
           Requires: libgnuradio-blocks-3.7.2.1.so.0.0.0
Error: Package: gqrx-2.2.0-4.fc20.i686 (updates)
           Requires: libgnuradio-runtime-3.7.2.1.so.0.0.0
Error: Package: gqrx-2.2.0-4.fc20.i686 (updates)
           Requires: libgnuradio-pmt-3.7.2.1.so.0.0.0
Error: Package: gqrx-2.2.0-4.fc20.i686 (updates)
           Requires: libgnuradio-analog-3.7.2.1.so.0.0.0
Error: Package: gqrx-2.2.0-4.fc20.i686 (updates)
           Requires: libgnuradio-filter-3.7.2.1.so.0.0.0

I can't find anything that provides these requirements.
 I have gnuradio-3.7.3-1.fc20.i686 installed.

[Alexandru Csete]

It means that gqrx was built against gnuradio 3.7.2.1 and not 3.7.3.
It's a packaging error and you should ask on fedora forums or the
package maintainer about this as there is nothing we (or at least I)
can do about this.

Alex

[jhha...@earthlink.net]

Thanks.  I see on bugzilla.redhat the problem is known and a fix is in

the updates-testing repository.  Which I was able to install with no trouble.

[Alexandru Csete]

Sounds good. THanks for the info.

Alex

[jhha...@earthlink.net]

(I figured out to add myself to the rtlsdr group)

Now...

lsusb reports
 Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
It's a NooElec R820T SDR & DVD-T

When I start gqrx it always opens a box "Gqrx has detected problems with the
current configuration..." so I punch the Yes box    It displays
Device  Realtek RTL2838UHIDIF
Device string rtl=0
sampe rate 1500000
LNB LO 0.0000000MHz
Audio output
Device  Default
Sample Rate 48 kHz

I don't know what's wrong with that so I punch OK

Then I get what looks like the gqrx main screen, but doesn't look like
any signals.

In the window where I started gqrx there is the following
$ gqrx
gr-osmosdr v0.1.x (0.1.1git) gnuradio 3.7.3
built-in source types: file fcd rtl rtl_tcp
Using Volk machine: sse2_32_mmx_orc
gr-osmosdr v0.1.x (0.1.1git) gnuradio 3.7.3
built-in source types: file fcd rtl rtl_tcp
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
Exact sample rate is: 1500000.014901 Hz
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

(and no end to the zeros)

[Alexandru Csete]

On Wed, Apr 9, 2014 at 2:22 AM, <jhha...@earthlink.net> wrote:
> (I figured out to add myself to the rtlsdr group)
>>
>> Now...
>
> lsusb reports
> Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
> It's a NooElec R820T SDR & DVD-T
>
> When I start gqrx it always opens a box "Gqrx has detected problems with the
> current configuration..." so I punch the Yes box It displays
> Device Realtek RTL2838UHIDIF
> Device string rtl=0
> sampe rate 1500000
> LNB LO 0.0000000MHz
> Audio output
> Device Default
> Sample Rate 48 kHz
>
> I don't know what's wrong with that so I punch OK
>
> Then I get what looks like the gqrx main screen, but doesn't look like
> any signals.

You have to "Start DSP" otherwise nothing will happen.

> In the window where I started gqrx there is the following
> $ gqrx
> gr-osmosdr v0.1.x (0.1.1git) gnuradio 3.7.3
> built-in source types: file fcd rtl rtl_tcp
> Using Volk machine: sse2_32_mmx_orc
> gr-osmosdr v0.1.x (0.1.1git) gnuradio 3.7.3
> built-in source types: file fcd rtl rtl_tcp
> Using device #0 Realtek RTL2838UHIDIR SN: 00000001
> Found Rafael Micro R820T tuner
> Exact sample rate is: 1500000.014901 Hz
> OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

This is printed by the rtl-sdr driver library when the samples are not
consumed. Newer versions of the library do not print this unless there
is a real under/overflow.

Alex

[jhha...@earthlink.net]

On Wednesday, April 9, 2014 3:44:23 AM UTC-5, Alexandru Csete wrote:

On Wed, Apr 9, 2014 at 2:22 AM,  <jhha...@earthlink.net> wrote:
> (I figured out to add myself to the rtlsdr group)
>>
>> Now...
>
> lsusb reports
>  Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
> It's a NooElec R820T SDR & DVD-T
>
> When I start gqrx it always opens a box "Gqrx has detected problems with the
> current configuration..." so I punch the Yes box    It displays
> Device  Realtek RTL2838UHIDIF
> Device string rtl=0
> sampe rate 1500000
> LNB LO 0.0000000MHz
> Audio output
> Device  Default
> Sample Rate 48 kHz
>
> I don't know what's wrong with that so I punch OK
>
> Then I get what looks like the gqrx main screen, but doesn't look like
> any signals.

You have to "Start DSP" otherwise nothing will happen.

Thanks, that made the spectrum display look alive.  Now do you know why I always get that box on startup
that says GQRX has detected problems... and if I should be putting anything different in there.  And I'm
not getting any audio out of the computer.  

[jhha...@earthlink.net]

On Wednesday, April 9, 2014 4:35:32 PM UTC-5, jhha...@earthlink.net wrote:

And then the next time I started it, I didn't get the box saying there is an error.

And then I found the volume control and now I have sound!  FB!

Only trouble now is I'm listening to an FM station and the audio is very choppy.

[Alexandru Csete]

Could be because of high CPU load. If cpu load is not high, selecting
a different sample rate might improve the choppyness.

Alex