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[Discuss-gnuradio] Re: GNU RADIO Question

From: 'Eric Blossom'
Subject: [Discuss-gnuradio] Re: GNU RADIO Question
Date: Thu, 5 May 2005 12:54:41 -0700
User-agent: Mutt/1.5.6i

On Thu, May 05, 2005 at 04:39:18PM +0930, mark shrapnel wrote:
> Hi,
> I have requstered to be on the gnuradio discussion list.  Is the server 
> for the list down as I cannot access any information.

Seem to be back up now.

> I am tyring to run "dialtone" in gnuradio-examples-0.3.tar.gz and cannot 
> get a dial tone. I have installed all the modules except gr-audio-alsa. 
> Does "dialtone" use gr-audio-alsa?

Anything using audio will probe for whatever audio module you've got
installed.  Right now it tries ALSA and then OSS.  Under GNU/Linux,
ALSA is a better choice.

When you run dialtone.py is there an error, or just no sound output?
If no sound output, bring up one of the audio mixers and make sure
that the MAIN and PCM volume levels are at 100%.

Did you run alsaconfig after installing ALSA?
Are the ALSA kernel modules loaded?  They have names like snd-*

$ /sbin/lsmod | grep snd-
snd-seq-oss            31232  0
snd-seq-midi-event      6080  1 snd-seq-oss
snd-seq                47440  4 snd-seq-oss,snd-seq-midi-event
snd-pcm-oss            49480  0
snd-mixer-oss          17376  3 snd-pcm-oss
snd-intel8x0           30124  3
snd-ac97-codec         69392  1 snd-intel8x0
snd-pcm                81800  2 snd-pcm-oss,snd-intel8x0
snd-timer              20356  2 snd-seq,snd-pcm
snd-page-alloc          7400  2 snd-intel8x0,snd-pcm
snd-mpu401-uart         5856  1 snd-intel8x0
snd-rawmidi            19300  1 snd-mpu401-uart
snd-seq-device          6344  3 snd-seq-oss,snd-seq,snd-rawmidi
snd                    45988  13 

> I have installed the latest version of Alsa but when running ./configure 
> I get the following error: Libary requirements (alsa >= 0.9) not met; 
> consider adjusting the PKG_CONFIG_PATH environment variable if you 
> libaries are in a nonstandard prefix os pkg-config can find them.

It's looking for a file called alsa.pc that tells it where to find the
includes and libraries.  It's usually installed in either
/usr/lib/pkgconfig/alsa.pc or /usr/local/lib/pkgconfig/alsa.pc

If the file is in /usr/local/lib/pkgconfig/alsa.pc 

  $ export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

If you installed ALSA from an RPM be sure to install the -devel-
version also.  It's probably named something like

> I am using Fedora 1 as I could not get mc4020 (which I need) to install 
> on fedora 3. I think that the problem was a 2.6 kernel issue. I am able 
> to install and load the mc4020 module on kernel 2.4

The CVS version of mc4020 builds and works on 2.6 modulo a problem
creating device files.  The fix is to properly integrate the driver
with the new udev interfaces.  No one has stepped up to fix the
problem, hence it hasn't been fixed.


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