[ardour-users] jackd problem: pcm failed

Metal3d metal3d at metal3d.com
Sun May 30 02:31:29 PDT 2004


I confirm, qjackctl kill artsd and is a good way to run jackd and 
configure it


R Parker a écrit :

>Hi,
>
>  
>
>>switched to root and entered jackd -R -d alsa -
>>sblive.
>>
>>jackd aborts with the message:"pcm.c:690:
>>snd_pcm_nonblock: Assertion 
>>'pcm' failed."
>>
>>What am I missing?
>>    
>>
>
>I would suggest installing qjackctl. It's a good
>application for managing the startup, shutdown and
>routing for jackd.
> 
>I think qjackctl will kill ARTS for you if it's
>running.
>
>  
>
>>Philcordia asked:  Is ARTS or esound running?
>>
>>Answer: I don't believe so.  top shows only one
>>active file, top itself.
>>
>>Philcordia asked: Have you tried jack with -S or -P?
>> Does jackd without 
>>-d sblive do anything?
>>
>>Answer:  When I started jack it wanted to rip a cd.
>>    
>>
>
>That's another application that has nothing to do with
>jackd.
> 
>  
>
>>jackd -R -d alsa 
>>and jackd -R -d alsa -d hw:0 give the same result as
>>above.
>>
>>Philcordia asked:  Maybe some stale temporary files.
>> Where did you 
>>configure jact?
>>
>>Answer:  I didn't.  I used apt-get install jackd to
>>get the debian 
>>package and read user-howto.gz.  There is no mention
>>of configuration or 
>>temporary files and I cannot locate jact in my
>>system.
>>    
>>
>
>There is no jact, it's a typo error. I think the point
>is to find your jack tmp dir and remove "stale"
>temporary files.
>
>>From my RH9 PLANET CCRMA /etc/fstab:
>none                    /var/lib/jack/tmp       tmpfs 
> defaults         0 0
>
>[root at stepdaddy studio]# ls /var/lib/jack/tmp/
>jack_0      jack-ack-fifo-5866-0  jack-ack-fifo-5866-2
>jack_ack_0  jack-ack-fifo-5866-1
>
>These files left behind from a crash or whatever can
>cause problems. 
>
>  
>
>>A final note:  My objective is to capture input from
>>my phonograph, 
>>remove cracks and clicks and write the result to a
>>cd.  The phonograph 
>>input is to the sblive card, the output from the
>>card is to my stereo 
>>system.
>>    
>>
>
>I know this has been discussed on the Linux Audio User
>lists and it sounded like a good solution exists. I
>guess search those list archives.
>
>You should note that jackd is a lowlatency solution
>designed for professional audio work. It certainly can
>be used to capture any data including your phonograph
>sources coming through an sblive and into alsa. My
>point is, you may find it much easier to not use
>jackd. Just stick with alsa and Audacity or whatever
>you dig out of the Linux Audio User archives.
>
>If you're determined to use jackd and Ardour, these
>present greater challanges. You will need to tune that
>computer for lowlatency performance. It can be a
>challanging task, depending on your hardware. Also,
>Ardour is a beta tool. It's a challange to get it
>working. There are tools out there that are so much
>simpler for what you describe. Save yourself the
>headache unless you want to experiment and learn.
>
>ron
>
>  
>
>>Tom George
>>_______________________________________________
>>ardour-users-ardour.org mailing list
>>ardour-users at lists.ardour.org
>>
>>    
>>
>http://lists.ardour.org/listinfo.cgi/ardour-users-ardour.org
>
>
>
>	
>		
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