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Date:      Fri, 11 Aug 2006 05:09:19 +0800
From:      Ariff Abdullah <ariff@FreeBSD.org>
To:        TAMURA Kent <kent@NetBSD.org>
Cc:        freebsd-multimedia@FreeBSD.org
Subject:   Re: snd_ich dies
Message-ID:  <20060811050919.1d8bb187.ariff@FreeBSD.org>
In-Reply-To: <20060810065109.78A5D15EB090@gabi-n.hauN.org>
References:  <20060810035426.GA28177@Update.UU.SE> <20060810065109.78A5D15EB090@gabi-n.hauN.org>

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On Thu, 10 Aug 2006 15:51:09 +0900 (JST)
TAMURA Kent <kent@NetBSD.org> wrote:
>=20
> > My audio dies, espcially when my system is under heavy load.
> > Otherwise I can maybe play music for an half hour, (with choppy
> > sound).
>=20
> >     vendor   =3D 'Intel Corporation'
> >     device   =3D '82440MX AC'97 Audio Controller'
>=20
> 440MX has a hardware erratum and an audio driver should have
> special handling to avoid it.  The drivers of NetBSD and ALSA
> does it, and FreeBSD's does not for now.
>=20
> ALSA:
> http://hg-mirror.alsa-project.org/alsa-kernel?cmd=3Dchangeset;node=3De0d1=
f8060d20;style=3Dgitweb
>=20
> NetBSD:
> http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=3D19919
> http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/pci/auich.c.diff?r1=3D1.3=
3&r2=3D1.34
>=20
>=20
Looks trivial enough, though both BUS_DMA_NOCACHE/COHERENT almost a
noop for most FreeBSD archs. I'll revisit this sooner using other
non-cacheable method.


Thanks.


--
Ariff Abdullah
FreeBSD

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