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

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Message-ID: <alpine.LNX.2.00.1003110824390.4672@eeebox2.perex-int.cz>
Date:	Thu, 11 Mar 2010 08:30:21 +0100 (CET)
From:	Jaroslav Kysela <perex@...ex.cz>
To:	VDR User <user.vdr@...il.com>
cc:	Wu Fengguang <fengguang.wu@...el.com>, 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

On Wed, 10 Mar 2010, VDR User wrote:

> [pid 22651] ioctl(21, 0x80044121, 0xb439d2cc) = -1 EPIPE (Broken pipe)
> pcm_hw.c: snd_pcm_hw_delay() SNDRV_PCM_IOCTL_DELAY failed.

-EPIPE means underrun condition.

Try 'echo 101 > /proc/asound/card0/pcm0p/xrun_debug' and send dmesg 
output to check if the ring buffer pointer in the hda-intel driver does 
not return wrong values. Replace card0 and pcm0p with right identifiers 
(look to 'aplay -l' for right numbers).

More info: http://www.alsa-project.org/main/index.php/XRUN_Debug

 					Jaroslav

-----
Jaroslav Kysela <perex@...ex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.

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