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From: Stephan Schindel <sts@tp1.rub.de>
Subject: Re: kern/175220: [sound] sound stopping: play interrupt timeout,
 channel dead
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The following reply was made to PR kern/175220; it has been noted by GNATS.

From: Stephan Schindel <sts@tp1.rub.de>
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/175220: [sound] sound stopping: play interrupt timeout,
 channel dead
Date: Mon, 14 Jan 2013 23:01:09 +0100

 OK I think I've got it. At this time I am not sure which of these two
 settings has fixed the issue, but I've changed the following:
 
 # /boot/device.hints
 hint.hdac.0.msi="0"
 
 # /etc/sysctl.conf
 dev.hdac.0.polling=1
 
 So far so good, no driver crashing until now =). I will do further
 testing to find out which of these did the trick :).