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Date: Wed, 23 Jan 2002 13:43:45 +0100
From: Alexander Langer <alex@big.endian.de>
To: freebsd-current@FreeBSD.org
Cc: orion@FreeBSD.org
Subject: pcm: cracking noise for CMedia driver
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Hi!

I own an ASUS A7V266-E motherboard with onboard-sound.

With this kernel:
FreeBSD zerogravity.kawo2.rwth-aachen.de 5.0-CURRENT FreeBSD 5.0-CURRENT #1: Thu Dec 20 00:34:04 CET 2001     alex@zerogravity.kawo2.rwth-aachen.de:/storage/zerogravity/obj/usr/src/sys/CICHLIDS  i386

Sound works fine, as it should (ok, I can't get line-in/mic to work, but
that's another issue).

alex@zerogravity ~dir $ cat /dev/sndstat 
FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <CMedia CMI8738> at io 0xd800 irq 10 (1p/1r/0v channels duplex default)

With a kernel starting January 18th or so I always get a cracking noise
on tones with high loudness, e.g. on MP3s with much bass.

I can't see any changes to the cmi-driver in that timespan, though, so
I wonder what might have changed.

Any idea?

Thanks

Alex

PS:
lock order reversal
 1st 0xc66e7b00 pcm0 @ /usr/src/sys/dev/sound/pcm/sound.c:132
 2nd 0xc66e7940 pcm0:play:0 @ /usr/src/sys/dev/sound/pcm/sound.c:189


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