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Date: Thu, 14 Feb 2002 15:23:28 -0800 (PST)
From: William Ward <william.ward@ericsson.com>, wardd@mobycarp.org
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/34942: Attempt to play -> "pcm0: play interrupt timeout, channel dead"
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>Number:         34942
>Category:       kern
>Synopsis:       Attempt to play -> "pcm0: play interrupt timeout, channel dead"
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Feb 14 15:30:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     William Ward
>Release:        4.5-RELEASE
>Organization:
none
>Environment:
FreeBSD lappy.exu.ericsson.se 4.5-RELEASE FreeBSD 4.5-RELEASE #4: 
Thu Feb 14 22:56:27 CST 2002     wardd@lappy.exu.ericsson.se:
/usr/src/sys/compile/LAPPY  i386

>Description:
Sending data to pcm device results in messsage from kernel:

	pcm0: play interrupt timeout, channel dead

The machine is a Toshiba Tecra 8000.  The sound works with 
FreeBSD 4.2 RELEASE but not with 4.5.  It may have actually
been broaken around 4.4 or so.

% cat /dev/sndstat
FreeBSD Audio Driver (newpcm) Feb 14 2002 21:20:52
Installed devices:
pcm0: <OPL3-SAx (YMF719)> at io 0x530 irq 10 drq 1 (1p/1r/0v channels)

I can cat a file to /dev/audio and get sound for about one
second.  Then the sound stops and pcm0 reports the error.

>How-To-Repeat:
Using Tecra 8000 laptop, build kernel with the following line:

	device          pcm0 at isa? irq 10 drq 1 flags 0x0

Then send some data to it:

	% cat /kernel > /dev/audio

An audio file might sound better but if the problem is happening
you will only get about one second of kernel music.
>Fix:
Is it normal for one's brain to mealt down while reading source code?
>Release-Note:
>Audit-Trail:
>Unformatted:

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