[linrad] Re: segmentation fault

[Roger Rehr <comcast.net; w3sz@xxxxxxxxxxxxxxxx>]

Hi Dan,

Thanks for the answers!  So the version of nasm and the [32 bit] OS 
size are not problems.


When setting up the soundcard in Linrad, you should have selected 
option [2], One Rx channel, I/Q [direct conversion receiver].  If you 
selected option [4], things would surely crash.  You might post a 
listing of exactly what choices you made, a la:
----------
1.  You will be presented with the first of several soundcard selection 
screens.  You will see a listing of your soundcards and below that list 
will be the request ?Select (first) device for Rx input by line number:?

In my case, I use the M-Audio Delta 44 1 and 2 channels for input and 
so I select ?2?, for ?M-Audio Delta 44 1 / 2? and hit ?ENTER?.

2.  Then I am asked ?Do you need more channels from the same soundcard? 
(Y/N)?.  I type ?N?.  If I were doing dual-polarity receive EME with 
the Delta44 I would still type ?N? because the Delta 44 multi device 
driver supports 4 channels.

3.  Then I am asked to enter ?Sampling speed (Hz):? and I type ?96000? 
and hit ?ENTER?, and on the same screen I am then asked to enter ?No of 
bits (16/24):? and I type ?24? and again hit ?ENTER?.

4.  The I am asked to ?Select a radio interface and given four choices: 
[1] one rx channel (normal audio), [2] one rx channel I/Q (direct 
conversion rx), [3] two rx channels (adaptive polarization/phasing), 
[4] two rx channels, I/Q.  I choose [2] for terrestrial work and [4] 
for EME, so here I choose [2].

5.  The next screen asks me to ?Select device for Rx output? and I 
select [0] Realtek HD Audio output, my motherboard sound, and again hit 
?ENTER?. I type enter again, and then I am back to the main screen and 
I type ?W? to save my choices.
---------

You can edit to show what choices you made and exactly where you see 
the segfault [I am guessing after number [4], but I am not sure if it 
is before or after [5].  With this info it may be easier to piece 
things together.

By the way, it is not a baud rate, it is sampling rate in samples per 
second that the computer asks for.

Good Luck, keep us posted, and

73,

W3SZ
Roger Rehr
http://www.nitehawk.com/w3sz


Quoting Dan Sawyer <dansawyer@xxxxxxxxxxxxx>:

> Roger,
>
> Thank you again. See below.
>
> - Dan
>
> Roger Rehr wrote:
> > Hi, Dan,
> >
> > I have a couple of more questions the answers to which might help to 
> > figure things out if you are still having problems with segmentation 
> > faults.  As Leif noted, you should not worry about doing the 
> > hardware test.  Go right to "U" to set up soundcards, then to "D" 
> > SSB OR "A" Weak Signal CW.
> >
> > 1.  Were you using OSS from the first, before you started with Linrad?
> Yes, it supports system sound.
> > 2.  If so, did FC6 come with it installed or did you add it?
> Yes. I have updated the kernel and it is also configured for OSS.
>
> > 3.  Is the audio now working in Linrad when you go into "D" or "A" 
> > for example from the main screen?
> No. The D option asks for channels, the a baud rate. It reports input
> and output cannot work concurrently and then errors with a seg fault.
> > 4.  If not, what exactly happens when you to to "U" from the main screen?
> see 3.
> > 5.  What version of nasm are you using?
> nasm-0.98.39-3.2.2
> > 6.  What kernel version are you using?
> 2.6.21.1
> > 7.  Is your  machine 64 bit or 32 bit and if 64 bit are you running 
> > 64 bit version of FC6?
> 32 bit
> > If things are working you can ignore all of these questions ;)
> >
> > 73,
> >
> > W3SZ
> > Roger Rehr
> > http://www.nitehawk.com/w3sz
> >
> >
> > Quoting Dan Sawyer <dansawyer@xxxxxxxxxxxxx>:
> >
> > > All,
> > >
> > > xlinrad is now building and running. However attempts to perform the z
> > > command, hardware interface test, produces a segmentation fault.
> > >
> > > Other sound apps, mplayer, etc run fine. The system is using OSS.
> > >
> > > Thanks - Dan
> > >
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> >
> > Roger Rehr
> > W3SZ
> > http://www.nitehawk.com/w3sz
> >
> >
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Roger Rehr
W3SZ
http://www.nitehawk.com/w3sz


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