Re: Reproducable Kernel HARD lockup

> 
> On Fri, Apr 04, 2008 at 09:06:23AM -0400, Tuc at T-B-O-H.NET wrote:
> > > 
> > > On Fri, Apr 04, 2008 at 12:24:26AM -0400, Tuc at T-B-O-H.NET wrote:
> > > > Hi,
> > > > 
> > > > 	LONG LONG LONG story made short.
> > > > 
> > > > 	Running Soekris 4801-60 previously on 5.5 . Would lock up
> > > > every so often, then more often, then finally constantly. Shipped
> > > > back to vendor, replaced, all good. Months later started to lock
> > > > every few weeks, then every few hours. Replace CF with hard drive,
> > > > locks in 10 minutes, etc.
> > > > 
> > > > 	Load OpenBSD on disk. Runs for days with no problem. 
> > > > Decide I don't like OpenBSD ports system so decide to go FreeBSD
> > > > 7. Glitch with memory stick, but otherwise system seems to run
> > > > fine. Start SETI, system locks HARD. I have it set to be able
> > > > to break to debugger with CR ~ ^b, but that just doesn't happen.
> > > > (Previously tested it would in single user when system running
> > > > fine).
> > > > 
> > > > 	Is there any way to debug a kernel lockup if you CAN'T
> > > > break to debugger??
> > > 
> > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html
> > > 
> > > Hope this helps.
> > >
> > 	Unfortunately, not that I can see.
> > 
> > 	Kernel already had :
> > 
> > options         KDB
> > options         KDB_TRACE
> > options         KDB_UNATTENDED
> > options         DDB
> > #break on sequence CR ~ ^b
> > options         ALT_BREAK_TO_DEBUGGER
> > 
> > 	And I couldn't break to the debugger for love nor money
> > once it happens. I also can't remote debug due to my 7.0 system not
> > having a serial port.
> > 
> > 			Thanks, Tuc
> 
> Do you have a firewire port?
> See http://www.lemis.com/grog/Papers/Debug-tutorial/tutorial.pdf for
> an explanation on how to setup firewire debugging.
> 
	No, sorry. I have 7 ethernet, 2 serial, CF, IDE and USB
on the device dying. I have 1 ethernet, 1 modem, 2 USB, 2 PCMCIA,
parallel port on my other 7.0 system (OLD Toshiba Laptop).
I'm also a little limited by supplies. I'm 9 miles off paved road
on the edge of the Atlantic Ocean. Supplies aren't scheduled to be
brought in to me until the 12th. Its an 11 mile walk to my car.
Great view though. :-/

			Tuc