From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wu Fengguang <fengguang.wu@intel.com>
Subject: Re: [PATCH]Support MCP89 and GT21x hdmi audio
Date: Wed, 10 Mar 2010 20:54:56 +0800
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Cc: Wei Ni <wni@nvidia.com>, alsa-devel <alsa-devel@alsa-project.org>, Takashi Iwai <tiwai@suse.de>, linux-kernel <linux-kernel@vger.kernel.org>, Jaroslav Kysela <jkysela@redhat.com>, akpm <akpm@linux-foundation.org>, Pavel Hofman <pavel.hofman@insite.cz>
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> > Could you do strace for ALSA ioctls? At least having the error code might
> > help to identify this issue.
> 
> I don't know how but I'm willing to try if you want to tell me how to
> do it.  Please keep in mind, I'm just an end-user -- not a developer
> or even c coder.  The most I've done is run xine in gdb to help supply
> bug info to those devs.

strace -o alsa-strace  speaker-test -Dhw:0,3 -t wav -c2 -l1                

Or 

strace -o alsa-strace  mplayer -ao alsa:device=hw=0.3 XXXXXXXX.mp3


Do you see error messages when playing via other audio devices, eg.

        mplayer -ao alsa:device=hw=0.0 XXXXXXXX.mp3

?

Thanks,
Fengguang