Hard Hang, nothing in logs / no panics
Kris Kennaway
kris at obsecurity.org
Fri May 11 21:47:36 UTC 2007
On Fri, May 11, 2007 at 04:43:06PM -0500, Roger Miranda wrote:
>
> > You missed that the debugger is there to debug bugs (including
> > deadlocks). Break to the debugger and obtain the necessary debugging
>
> I should've been more clear. I can not break to the debugger (CTRL-ALT-ESC)
> when the system locks up.
You may need the KDB_STOP_NMI option, especially if it is an SMP
system. I forget if you also need to enable a sysctl on 6.x (look at
sysctl -a | grep nmi for the obvious one)
> Am I possible looking at a hardware issue? If so
> what is the best way to test for it?
If that doesn't work then in my experience it is likely to be
hardware-related. The usual debugging procedure then involves trying
to replicate on an unrelated machine, and/or swapping out hardware
components.
Kris
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