Were you able to get any clarification here?  I'm running into the same 
issue but it seems this is still an open question.

On Monday, October 19, 2015 at 8:25:01 PM UTC-4, [email protected] 
wrote:
>
> Currently trying to get the watchdog on the BBB working.
>
> It works fine when the code stops running, but from what I gather, it is 
> an embedded circuit, so it should work if the processor freezes up.
>
> Am I wrong here?   Do I need to buy an external watchdog for when the BBB 
> completely locks up?
>
> I run the watchdog, and then run a halt -f command.  The BBB freezes up, 
> doesn't perform a shutdown though.
>
> The watchdog never reboots the BBB.
>
> I've tried playing with the NOWAYOUT setting in the /etc/watchdog.conf 
> file but that didn't seem to work.
>
> Thanks for any help,
>
> Daniel
>

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