On Fri, Dec 04, 2009 at 12:29:30AM -0800, Garrett D'Amore wrote:
> James Lee wrote:
> >I also have an Ultra 24 that has this problem.  I've had it happen with any 
> >application that uses sound including mplayer, mpd, and flash.  It seems to 
> >happen randomly, sometimes every five minutes, sometimes not for hours.  
> >When it happens, nothing else is using the audio device at the time.  For 
> >me, restarting the application will get rid of the static for a while.  I 
> >had the issue in b127 and still have it in b128.
> >
> >I was able to record the problem to be able to share what it sounds like: 
> >http://thestaticvoid.com/dump/opensolaris-audiohd-static.ogg .  The static 
> >begins at 10 seconds into the clip.  At 26 seconds, I pause and unpause mpd, 
> >which resolves the problem for a few minutes.
> >
> >Let me know if I can provide anymore details.  Thanks.
> 
> It would be good to test this with the very latest bits. I think
> there have been some recent changes in audiohd that are part of b129
> that are specifically addressed at problems with the U24.

James, on my Ultra-24 (running snv_127 right now), I modified:

   /kernel/drv/audiohd.conf

and reduced play-interrupts and record-interrupts to 50:

  play-interrupts=50;
  record-interrupts=50;

I consistently encountered the static problem on many snv releases 
in the past, but have not seen it since I made this change.  And this
is after tens of hours of audio playing via the legacy Solaris  audio
interface.

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