Re: [Alsa-devel] snd-cmipci with Jack not working

[Antti Boman]

Takashi Iwai wrote:

At Thu, 30 Jan 2003 01:48:18 +0200,
Antti Boman wrote:

- I have the lowlat patch installed in kernel, but using or not using it
doesn't seem to change anything.

most likely the kernel scheduler is irrelevant.

The only effect it had was locking the whole machine when using playback/capture only.

do you mean with LL-patch?  or with preempt patch?

Andrew Morton's (http://www.zip.com.au/~akpm/linux/schedlat.html#downloads) patch. Sorry about the flaws in terminology, I'm kind of half-dumb with these. If there are even difference with those ones, I have to check them out tonight and tell you then.

- Using jackd with playback/capture only, it produces the following
message:
 jackd: pcm.c:5851: snd_pcm_mmap_commit: Assertion 'pcm' failed

that's weird.

Yes, and as you most probably know, it refers to alsa-lib/src/pcm/pcm.c

if the above function is directly called from jack, then it should be
a bug of jack. the error above says the passed argument is a null
pointer.

I know. But I don't know if it's directly called from jackd. I'll try and ask more on jackit-devel or try to find things myself. May be another dead-end, though.

ah, sorry, what do you mean "kernel real-time patches"?
preempt-patch?

then i don't know.  i don't use them together with 2.4 kernels.

Then again, even without enabling low latency (whatsoever) it doesn't work. I'm just afraid this won't be solved. And I'm not afraid for myself, just for the fact that 8738 is a highly used chip. Have you tried running jackd with the one of yours?

Cheers,
-a



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