On Sunday, November 16, 2014 1:45:59 PM UTC-5, William Pretty Security 
wrote:
>
> As far as I know, it shouldn’t do that.
>
> The USB should provide power if the AC (+5v) is removed.
>
>  
>
> What else is connected to the BBB ?
>

I have a cape with a lithium battery, a serial port talking to a wireless 
gateway which is powered from the AC input also and an ethernet cable to 
the BBB nothing else, the battery is connected to the charging circuit of 
the PMIC.
I have two BBB which both do the same

>  
>
>  
>
>  
>
> "No one could make a greater mistake than he who did nothing because he 
> could do only a little."
>
> "All that is necessary for the triumph of evil is that good men do 
> nothing" Edmond Burke *(1729 - 1797)*
>
>
> http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book
>
>  
>
> *From:* [email protected] <javascript:> [mailto:
> [email protected] <javascript:>] *On Behalf Of *David Hirst
> *Sent:* Sunday, November 16, 2014 11:27 AM
> *To:* [email protected] <javascript:>
> *Subject:* [beagleboard] BeagleBone Black powers down when AC adapter is 
> removed while the USB is connected.
>
>  
>
> I am trying to manage power myself including battery backup, however if I 
> have USB power and AC adapter power whenever I disconnect the AC power, the 
> system shuts down shortly after. I would like to manage the shutdown 
> myself. 
> Can anyone tell me how to disable the default control
>
> Thanks
>
> -- 
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> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2015.0.5577 / Virus Database: 4213/8581 - Release Date: 11/16/14
> ------------------------------
>
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2015.0.5577 / Virus Database: 4213/8571 - Release Date: 11/14/14
>

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