From: "Clemens Ladisch" <cladisch@fastmail.net>
To: Akio <akioolin@gmail.com>, alsa-devel@alsa-project.org
Subject: Re: about sound/core/pcm_lib.c:1997: capture read error (DMA or IRQ trouble?)
Date: Wed, 26 Sep 2007 08:24:20 +0200 [thread overview]
Message-ID: <1190787860.12924.1212641403@webmail.messagingengine.com> (raw)
In-Reply-To: <loom.20070926T031709-238@post.gmane.org>
Akio write:
> after long time amr-wb codec loopback test. (above 90 hours)
> I got the following kernel message. it comes from snd_pcm_lib_read1()
> function.
> ALSA sound/core/pcm_lib.c:1997: capture read error (DMA or IRQ trouble?)
This error indicates that no interrupt has been received for ten
seconds.
I would have guessed that some 32-bit counter has overflowed, but at
48 kHz, a frame counter would overflow after slightly less than
25 hours.
HTH
Clemens
next prev parent reply other threads:[~2007-09-26 6:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-26 3:28 about sound/core/pcm_lib.c:1997: capture read error (DMA or IRQ trouble?) Akio
2007-09-26 6:24 ` Clemens Ladisch [this message]
2007-09-27 4:31 ` Akio
2007-09-27 7:14 ` Clemens Ladisch
2007-09-28 15:23 ` Akio
2007-10-01 6:49 ` Clemens Ladisch
2007-10-02 10:58 ` Akio
2007-10-02 11:23 ` Clemens Ladisch
2007-10-02 11:37 ` Akio
2007-10-04 4:50 ` Akio
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