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From: Joe Talbott <josepht@cstone.net>
Mail-Followup-To: Matthew Dillon <dillon@apollo.backplane.com>,
	bugs@crater.dragonflybsd.org
Subject: Re: kernel panic
Date: Wed, 13 Jun 2007 09:53:49 -0400
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References: <20070510210651.GB97594@nickel.oss.ntelos.net> <200705110017.l4B0Hf9w058377@apollo.backplane.com> <20070511011203.GA386@nickel.oss.ntelos.net> <200705111949.l4BJnKoE066826@apollo.backplane.com> <20070511200724.GA11983@nickel.oss.ntelos.net> <200705120050.l4C0o7iE069861@apollo.backplane.com> <20070512025318.GA13871@nickel.oss.ntelos.net> <200705130734.l4D7YZtw083017@apollo.backplane.com> <20070513233449.GA49298@nickel.oss.ntelos.net> <200705132347.l4DNlWU9091882@apollo.backplane.com>

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On Sun, May 13, 2007 at 04:47:32PM -0700, Matthew Dillon wrote:
> 
> :I made this change and shortly got another hang.  I was in X messing
> :around with a vkernel and was typing away when everything froze.  I
> :waited a bit after trying CTRL-ALT-ESC, CTRL-ALT-BKSP, CTRL-ALT-DEL,
> :and anything else I could think of, but the machine was frozen.  So I
> :held the power button down for 5s or so and rebooted.  After checking
> :my filesystems, what do you know another coredump was found and it is
> :the same as last time.  I am positive that I'm not looking at the
> :wrong vmcore.  I am inclined to believe that no coredump was ever
> :written to my swap partition or perhaps only a part of a coredump was
> :written before I power cycled the laptop.  I'm going to try to trigger
> :this running from the system console versus in X and see if I can get
> :into the debugger.  
> :
> :Joe
> 
>     If you have a serial port you can run a serial console to another 
>     machine.  If not you do have another option, and that is to compile
>     a kernel with:
> 
>     options DDB_UNATTENDED
> 
>     Hopefully when it crashes it will be able to write the core out.  If
>     it does, you should see the hard drive light for your laptop flicker
>     or go solid for however long it takes to write out the core.
> 
>     Note: Do *NOT* hard power cycle your machine while it is writing to the
>     hard drive.  That's a great way to destroy the hard drive.
> 

This has happened again.  The same as the first time the machine locks
up hard when doing a 'shutdown -h now' via icewm's shutdown function.
I had DDB_UNATTENDED compiled in my kernel but to no avail.  I did
notice the fan ramp up in speed but there was absolutely no HDD
activity indicated by the HDD LED.  I certainly can't rule out
icewm/xorg as the culprit.

Joe