snd_ich dies

[Ariff Abdullah]

On Thu, 10 Aug 2006 15:51:09 +0900 (JST)
TAMURA Kent <kent at NetBSD.org> wrote:
> 
> > My audio dies, espcially when my system is under heavy load.
> > Otherwise I can maybe play music for an half hour, (with choppy
> > sound).
> 
> >     vendor   = 'Intel Corporation'
> >     device   = '82440MX AC'97 Audio Controller'
> 
> 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.
> 
> ALSA:
> http://hg-mirror.alsa-project.org/alsa-kernel?cmd=changeset;node=e0d1f8060d20;style=gitweb
> 
> NetBSD:
> http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=19919
> http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/pci/auich.c.diff?r1=1.33&r2=1.34
> 
> 
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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