Thank  everybody for the ideas and advises. I think the simplest way will 
be to make a simplified power management with a low cost uC, that just 
delays turning off  the external power supply, just to give time to the BB 
to shutdown properly.

Does anybody know if the non used outputs of the TPS65217 (VLDO2, LS1_OUT, 
LS2_OUT) are  available on the expansion connector of BB?
Rgds.
G

Hello everybody,
> I have a GP output of a Beaglebone Green that turns the power off when it 
> is asserted by SW. It does its job well.
> However, I would like to power the Beagle off after having done a shutdown 
> (rather than turn it off suddenly).
> Is there any SW/HW trick to get this behavior?
> Thanks for the attention.
> G
>
>

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