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Date: Mon, 20 Oct 2003 13:14:33 -0400 (EDT)
From: Stuart Barkley <stuartb@4gh.net>
To: "Luis J. Rodriguez" <luisja@we.lc.ehu.es>
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cc: freebsd-multimedia@freebsd.org
Subject: Re: pcm0: <Intel 82801CA (ICH3)> fails at recording
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On Thu, 16 Oct 2003 at 16:37 +0200, Luis J. Rodriguez wrote:

> I have a Dell Latitude C640 laptop, with an integrated 16-bits
> soundcard, compatible with Soundblaster (Intel 82801CA). It plays
> well any kind of sound but it fails at recording.
> [...]
> it sounds creaky and slow, completely distorted.

You don't say what version of FreeBSD, but this has been fixed in some
versions.  See:

    http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/37831

I've been using a similar patch on my laptop with FreeBSD 4.7 which I
pulled directly from -STABLE some time ago:

diff -r -u ../src_dist/sys/dev/sound/pcm/feeder.c ./sys/dev/sound/pcm/feeder.c
--- ../src_dist/sys/dev/sound/pcm/feeder.c	Mon Apr 22 11:49:36 2002
+++ ./sys/dev/sound/pcm/feeder.c	Wed Feb 19 03:36:43 2003
@@ -388,6 +388,10 @@
 	l = min(count, sndbuf_getready(src));
 	sndbuf_dispose(src, buffer, l);

+	/* When recording only return as much data as available */
+	if (ch->direction == PCMDIR_REC)
+		return l;
+
 /*
 	if (l < count)
 		printf("appending %d bytes\n", count - l);

Stuart
-- 
I've never been lost; I was once bewildered for three days, but never lost!
                                        --  Daniel Boone