Re: [noise] The noise problem wrt Audigy 2 ZS

[Ian Kumlien <pomac@vapor.com>]

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On Mon, 2005-10-24 at 00:18 -0400, Lee Revell wrote:
> Please make sure to cc: the ALSA lists.

Yeah, i only hit reply last time, =P

> On Mon, 2005-10-24 at 02:14 +0200, Ian Kumlien wrote:
> > On Sun, 2005-10-23 at 12:27 -0400, Lee Revell wrote:
> > > On Sun, 2005-10-23 at 17:17 +0200, Ian Kumlien wrote:
> > > > Hi, 
> > > > 
> > > > I have found a bunch of topics on this now:
> > > > Squealing / Buzzing / Static noise with EMU10k1 and Audigy 2 ZS
> > > > https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1276
> > > 
> > > How are you able to access this site at all?  bugtrack.alsa-project.org
> > > has been giving me "Connection refused" for days.
> > 
> > It worked before, both from here and from a friends place... 
> > 
> > > Can you repost the text of the bug report?
> > 
> > Someone else did.
> > 
> > The interesting part of this is that it almost works for a while, if you
> > really work at it, you *can* get it to work sometimes. It feels like it
> > depends on where in the memory "things" are located, and by things i
> > mean either the kernel module or the app itself, i dunno which.
> > 
> > You can also hear more or less of the actual sound with the noise,
> > sometimes you don't hear any of it and sometimes you hear some of it.
> > 
> 
> Hmm.  You mentioned this bug only occurs on 64 bit machines or with more
> than 1GB of memory.  Maybe it can only DMA into the first 1GB of memory
> or something.  Try this patch.

Yes, that seems to work, and the comment above should apply to both
cards i think =)

(i compiled a new version of rc2 with this patch and it just started
playing fine, now contact the others =)

> --- include/sound/emu10k1.h~	2005-10-11 12:31:42.000000000 -0400
> +++ include/sound/emu10k1.h	2005-10-24 00:14:40.000000000 -0400
> @@ -48,7 +48,7 @@
>  
>  /* FIXME? - according to the OSS driver the EMU10K1 needs a 29 bit DMA mask */
>  #define EMU10K1_DMA_MASK	0x7fffffffUL	/* 31bit */
> -#define AUDIGY_DMA_MASK		0xffffffffUL	/* 32bit */
> +#define AUDIGY_DMA_MASK		0x7fffffffUL	/* 32bit */
>  
>  #define TMEMSIZE        256*1024
>  #define TMEMSIZEREG     4

-- 
Ian Kumlien <pomac () vapor ! com> -- http://pomac.netswarm.net

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