[ardour-users] jackd problem: pcm failed

[philicorda]

Thomas H. George wrote:

> I have installes alsa, patched a 2.4.22 kernel with preempt and 
> lowlatency, compiled the kernel with Sound Card Support,  Creative 
> SBLive! and OSS Sound modules as modules, set kernel.lowlatency=1 and 
> copied asoundrc to ~/.asoundrc, opened a terminal in the X display, 
> 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?
>
> Tom George
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>
Damm. I've had this, but I can't remember what caused it. :)
Some questions...
What's in that .asoundrc file?

Is ARTS, esound or any other sound server running? If so, kill them.
Some sound servers take a bit of beating to stop the coming back!

Have you tried starting jack with -S to force it to try 16bit samples?
Have you tried -P to force playback only? (just to see if it works).
Does starting Jackd without -sblive do anything?