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Date: Wed, 10 Feb 2016 13:47:16 +0200
From: Konstantin Belousov <kostikbel@gmail.com>
To: Greg Quinlan <gwq_uk@yahoo.com>
Cc: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>
Subject: Re: Open Sound System - OSS "soundon" command causes KERNEL PANIC
 FreeBSD-11
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On Wed, Feb 10, 2016 at 09:51:01AM +0000, Greg Quinlan wrote:
>   
>  Hi,
> 
> I haven't seen a Kernel Panic like this for a long time... i.e. repeatable and due to a single command.
> 
> I have compiled the port /usr/ports/audio/oss and installed it on FreeBSD11.
> 
> A ran  /usr/local/sbin/ossdetect which created the file /usr/local/lib/oss/etc/installed_drivers.
> 
> Contents:
> Code:oss_hdaudio #Intel High Definition Audio (CPT)
> 
> When i run  /usr/local/sbin/soundon
> 
> The system panics..
> 
> Code:osscore.ac97_amplifier="0"
> panic: Lock (sx) module subsystem lock sx lock not locked 0 /usr/src/sys/kern/kern_module.c:219
> cpu_id = 1
> :
> 
> 
> audio/oss Build 4.2-build2011
> 
> Any ideas?
Show the backtrace.  Basically, the information that you have stripped
from your mail.