It does appear as if some S/W will be in order. This is still a TODO on my 
list, just not as high a priority for now. Will post my findings.

On Tuesday, November 19, 2013 4:38:11 PM UTC-6, Gerald wrote:
>
> Sounds to me like the SW cannot handle the reapplication of the 5V. I 
> think it supplies an interrupt to the processor when 5V is reapplied  Check 
> the datasheet of the TPS65217C. If it does, all SW thinks is that the power 
> button was pressed and that you want to power down.
>
> Bottom line is I think you need to so some SW work to make this all work.
>
> Gerald
>
>
>
> On Tue, Nov 19, 2013 at 12:51 PM, Colin Bester 
> <[email protected]<javascript:>
> > wrote:
>
>> I have a Li-Ion battery connected to BBB (A6) to supply backup power in 
>> case of 5V power failure. If starting with 5V connected and I remove 5V the 
>> board continues to run as expected with no issues. If I then re-apply 5V 
>> power to power connector after a short while the BBB shuts down. I assume 
>> it's in the OFF mode as pressing the POWER button will cause board to wake 
>> up.
>>
>> If I start with just battery power and no 5V connected by pressing the 
>> POWER button to start (wake up) board then the board runs fine until I 
>> apply 5V power which again causes board to shutdown.
>>
>> Has anyone experienced this or have any suggestions?
>>
>> Thanks,
>> Colin
>>
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