On 02/12/16 01:04, Greg Quinlan wrote:
Spoke too soon...

I applied the patch (kern_module.diff - which was successful)

# cd /usr/src# patch <kern_module.diffHmm...  Looks like a unified diff to me...
The text leading up to this was:
|Index: sys/kern/kern_module.c
|--- sys/kern/kern_module.c     (revision 295464)
|+++ sys/kern/kern_module.c     (working copy)
Patching file sys/kern/kern_module.c using Plan A...
Hunk #1 succeeded at 214.
# make buildkernel:
# make installkernel:
# shutdown -r now
Logged in and ran# soundon
No panic!!

Thought the problem was fixed ... unfortunately, I assumed that the contents of 
/usr/local/lib/oss/etc/installed_drivers still contained
         oss_hdaudio #Intel High Definition Audio (CPT)
but somehow the file was empty
I ran
     # ossdetect    # soundon

Another KERNEL PANIC...  this time it scrolled off the screen. I tried setting 
this (below) in /etc/rc.conf but there is nothing in /var/crash

[entries in /etc/rc.conf]
I need help to recover the backtrace, please?


       From: Greg Quinlan <gwq...@yahoo.com>
To: Hans Petter Selasky <h...@selasky.org>; "freebsd-current@freebsd.org" 
  Sent: Thursday, 11 February 2016, 22:19
  Subject: Re: Open Sound System - OSS "soundon" command causes KERNEL PANIC 

Well done!!
Fixed. Thanks!

       From: Hans Petter Selasky <h...@selasky.org>
  To: Greg Quinlan <gwq...@yahoo.com>; "freebsd-current@freebsd.org" 
  Sent: Thursday, 11 February 2016, 17:54
  Subject: Re: Open Sound System - OSS "soundon" command causes KERNEL PANIC 

On 02/11/16 03:02, Greg Quinlan wrote:
Note: Does not happen on FreeBSD 10.1-Stable!

Yes, that's because WITNESS is off in 10.x by default.

Does the attached patch solve your problem?



It might be that audio/oss is not compatible with 11-current if it crashes like that.


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