[PlanetCCRMA] Jack/ALSA shutdown unexpectedly

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Mon Apr 28 09:19:33 PDT 2008


On Mon, 2008-04-28 at 07:15 -0700, Len wrote:
> Hi,
> 
> Under the planetccrma rt kernel (2.6.24.3-1.rt1.2.fc8.ccrmart) I'm getting 
> the following messages.  So far, I have not been able to reproduce the problem 
> using the stock f8 kernel (2.6.24.4-64.fc8).

It would seem you are hitting some sort of bug or interaction between
the realtime kernel and the echo sound driver. 

> >From /var/log/messages:
> 
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:745: pcm_trigger stop

What is right before this? Nothing else relevant?
It would seem the echo driver is having some problem and it is triggering 
the shutdown of jack. You could try booting with "acpi=off" or "nohz=off"
to see if that helps (just a guess, no real reason to know that it will
fix anything...)

-- Fernando


> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio_dsp.c:846: stop_transport 10001
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:646: pcm_hw_free(0)
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio_dsp.c:1067: free_pipes: Pipe 0
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:653: pcm_hw_freed
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:468: pcm_close
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:473: pcm_close  oc=1  cs=1  rs=1
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:479: pcm_close2 oc=1  cs=1  rs=1
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:646: pcm_hw_free(16)
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio_dsp.c:1067: free_pipes: Pipe 16
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:653: pcm_hw_freed
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:468: pcm_close
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:473: pcm_close  oc=0  cs=1  rs=1
> Apr 26 13:48:12 localhost kernel: ALSA sound/pci/echoaudio/echoaudio.c:479: pcm_close2 oc=0  cs=1  rs=0
> 
> 
> >From qjackctl message window:
> 
> 13:48:12.228 Shutdown notification.
> 13:48:12.258 JACK is stopping...
> 13:48:12.263 JACK is being forced...
> ALSA: poll time out, polled for 8705414 usecs
> DRIVER NT: could not run driver cycle
> jack main caught signal 12
> cannot read server event (Success)
> cannot complete execution of the processing graph (Resource
> temporarily unavailable)
> zombified - calling shutdown handler
> no message buffer overruns
> 13:48:12.465 JACK was stopped successfully.
> 13:48:12.466 Post-shutdown script...
> 13:48:12.467 killall jackd
> jackd: no process killed
> 13:48:12.913 Post-shutdown script terminated with exit status=256.




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