* Re: multi_pcm poll timeout error
2005-12-03 15:23 multi_pcm poll timeout error John Rigg
@ 2005-12-03 21:04 ` John Rigg
0 siblings, 0 replies; 2+ messages in thread
From: John Rigg @ 2005-12-03 21:04 UTC (permalink / raw)
Cc: alsa-devel, Pasi Kärkkäinen, Achim_Kuntz, Lee Revell,
Frank van de Pol
On Sat, Dec 03, 2005 at 03:23:18PM +0000, John Rigg wrote:
> The pcm_multi plugin doesn't work currently with jackd in duplex mode.
> It's OK for either capture or playback with multi cards, but a poll time out
> occurs in duplex mode. Several users have experienced this problem with
> multiple ice1712 and RME cards.
> After some testing I found the following:
>
> alsa-lib-1.0.8 works
> alsa-lib-1.0.9rc1 onwards gives poll time out
The following patch comments out the offending code in
alsa-lib-1.0.10/src/pcm/pcm_multi.c and allows jackd to run in duplex
mode with multiple cards.
Obviously this isn't a proper fix (the code must have been added for
a reason) but it's working so far on my system.
John
--- src/pcm/pcm_multi.c.orig 2005-12-03 20:10:58.000000000 +0000
+++ src/pcm/pcm_multi.c 2005-12-03 20:20:56.000000000 +0000
@@ -597,7 +597,7 @@ static int snd_pcm_multi_resume(snd_pcm_
return err;
}
-static int snd_pcm_multi_link_fd_failed(snd_pcm_t *pcm, int fd)
+/* static int snd_pcm_multi_link_fd_failed(snd_pcm_t *pcm, int fd)
{
snd_pcm_multi_t *multi = pcm->private_data;
unsigned int i;
@@ -638,7 +638,7 @@ static int snd_pcm_multi_unlink(snd_pcm_
multi->slaves[i].linked = 0;
}
return 0;
-}
+} */
static snd_pcm_sframes_t snd_pcm_multi_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
@@ -726,9 +726,9 @@ static snd_pcm_fast_ops_t snd_pcm_multi_
.rewind = snd_pcm_multi_rewind,
.forward = snd_pcm_multi_forward,
.resume = snd_pcm_multi_resume,
- .link_fd = snd_pcm_multi_link_fd,
+// .link_fd = snd_pcm_multi_link_fd,
.link = snd_pcm_generic_link2,
- .unlink = snd_pcm_multi_unlink,
+// .unlink = snd_pcm_multi_unlink,
.avail_update = snd_pcm_multi_avail_update,
.mmap_commit = snd_pcm_multi_mmap_commit,
.poll_descriptors_count = snd_pcm_multi_poll_descriptors_count,
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^ permalink raw reply [flat|nested] 2+ messages in thread