linux-kernel - Re: [alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio

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Date:	Wed, 10 Mar 2010 20:54:56 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	VDR User <user.vdr@...il.com>
Cc:	Jaroslav Kysela <perex@...ex.cz>, Wei Ni <wni@...dia.com>,
	Takashi Iwai <tiwai@...e.de>,
	alsa-devel <alsa-devel@...a-project.org>,
	Jaroslav Kysela <jkysela@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>,
	Pavel Hofman <pavel.hofman@...ite.cz>
Subject: Re: [alsa-devel] [PATCH]Support MCP89 and GT21x hdmi audio

> > 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
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