Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[bglazierjr]

Sorry to revive an old thread but I wanted to add my solution to this 
problem somewhere and this seems like the most appropriate place to do it. 
I was also experiencing the Bone shutting itself down on AC Power removal 
regardless of a battery present. The logs showed it was registering the 
removal as a button press condition and powering down the unit. I had a 
product running on 4.1.19-bone20 and did not want to update to a later 
kernel but it appears to be resolved in later kernels already. 

To fix on 4.1.19-bone20, I modified the file mentioned here 
(/drivers/mfd/tps65217.c) and commented out this code entirely:

/*
if (int_reg & TPS65217_INT_ACI) {
/* Handle AC power status change 
dev_dbg(tps->dev, "AC power status change\n");
/* Press KEY_POWER when AC not present 
input_report_key(tps->pwr_but, KEY_POWER,
~status_reg & TPS65217_STATUS_ACPWR);
input_sync(tps->pwr_but);
}
*/

After I rebuilt and deployed the modified kernel, the problem was resolved, 
no more power down on AC removal.
For anyone who needs further instructions, I'd be happy to help.


On Wednesday, November 19, 2014 at 10:12:05 AM UTC-5, 
dhi...@schneiderdcim.com wrote:
>
> in /drivers/mfd/tps65217.c  i believe this is where the magic happens, and 
> needs to be changed
>
>
>  if (int_reg & TPS65217_INT_PBI) { 
>  /* Handle push button */ 
>  dev_dbg(tps->dev, "power button status change\n"); 
>input_report_key(tps->pwr_
> but, KEY_POWER, 
>  status_reg & TPS65217_STATUS_PB); 
>  input_sync(tps->pwr_but); 
>  } 
>  if (int_reg & TPS65217_INT_ACI) { 
>  /* Handle AC power status change */ 
>
>
>
> On Tuesday, November 18, 2014 1:57:47 PM UTC-5, Gerald wrote:
>>
>> Then the SW needs to be changed to change that behavior.
>>
>> Gerald
>>
>>
>> On Tue, Nov 18, 2014 at 10:37 AM, David Hirst  wrote:
>>
>>> The fact that it powers down is a problem to me, if for instance a 
>>> slight power interruption occurs ( lets say 5 seconds) during which time 
>>> the CPU is powered by the battery backup I would like to carry on running, 
>>> if its longer then I would like to make the decision when to shutdown. 
>>> As it stands now I have no option but to have the system power down.
>>> With the current implementation In the event of a small interruption, 
>>> the system will start to power down but if that the power has now returned 
>>> prior to the shutdown occurring  the system needs intervention to power 
>>> back up, by power cycling either the USB or AC. I want to smooth out short 
>>> power cycles and let the long power outages re-power the board when the 
>>> power returns
>>>
>>>
>>> On Monday, November 17, 2014 10:04:21 AM UTC-5, Gerald wrote:

 That should be bale to be fixed by changing the behavior of the SW. You 
 can look at the datasheet for the TPS65217C to see what registers to 
 change.

 Gerald

 On Mon, Nov 17, 2014 at 8:58 AM, Michel Gerin  
 wrote:

> Attn Gerald Coley,
>
> Hello,
> In order to avoid any misunderstanding, I wrote "I had a similar 
> problem". But I didn't use the USB connection.
> Only 5V DC and battery were connected to the BBB.
> As soon as 5V DC PS was off, the Debian LXDE version was shutting down 
> but a warning was appearing telling the user the system was shutting down 
> within 60s if this procedure wasn't canceled.
> Maybe David Hirst's problem is related to the same software 
> "mecanism". 
>
> Kind regards
>
> Michel. 
>   
>
> 2014-11-17 12:31 GMT+01:00 Gerald Coley :
>
>> Interesting. Sounds like something I need to get fixed.
>>
>> Gerald
>>
>>
>> On Monday, November 17, 2014, Michel Gerin  
>> wrote:
>>
>>> Hello,
>>> I had a similar problem. David mentions perhaps this thread:
>>>
>>> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>>>
>>> Bremenpl suggested to use the debian console version instead of the 
>>> LXDE version. It solved my problem. 
>>>
>>> We just encontered a 2 hours mains power outage this saterday.The 
>>> BBB went on running flawless with the battery backup.
>>>
>>> Michel
>>>
>>> 2014-11-17 1:09 GMT+01:00 David Funk :
>>>
 There is a previous thread, several weeks ago about this same 
 behavior. That thread involved an application that ran off mains but 
 had 
 battery backup and everytime mains failed, and 5V goes away, the BBB 
 shutdown. 

 IIRC, this is a known software default behavior when the 5V goes 
 away, it is programmable and needs to be set accordingly to how the 
 end 
 user whats it to behave.


 -david
 .


 On Sun, Nov 16, 2014 at 5:52 PM, William Hermans >>> > wrote

RE: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[William Pretty Security]

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 ?

 

 

 

"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: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of David Hirst
Sent: Sunday, November 16, 2014 11:27 AM
To: beagleboard@googlegroups.com
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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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[David Hirst]

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:* beagl...@googlegroups.com  [mailto:
> beagl...@googlegroups.com ] *On Behalf Of *David Hirst
> *Sent:* Sunday, November 16, 2014 11:27 AM
> *To:* beagl...@googlegroups.com 
> *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
>
> -- 
> For more options, visit http://beagleboard.org/discuss
> --- 
> You received this message because you are subscribed to the Google Groups 
> "BeagleBoard" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to beagleboard...@googlegroups.com .
> For more options, visit https://groups.google.com/d/optout.
>
> 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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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[David Hirst]

On Sunday, November 16, 2014 5:39:48 PM UTC-5, David Hirst wrote:
>
>
>
> 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
>
>>  
>>
> I just tried the same thing without the cape and the same thing happens so 
all that is connected to the BBB is AC, USB and ethernet.  uname -a gives 
"Linux beaglebone 3.8.13 #1 SMP Wed Sep 4 09:09:32 CEST 2013 armv7l 
GNU/Linux"

>  
>>
>>  
>>
>> "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:* beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] *On 
>> Behalf Of *David Hirst
>> *Sent:* Sunday, November 16, 2014 11:27 AM
>> *To:* beagl...@googlegroups.com
>> *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
>>
>> -- 
>> For more options, visit http://beagleboard.org/discuss
>> --- 
>> You received this message because you are subscribed to the Google Groups 
>> "BeagleBoard" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to beagleboard...@googlegroups.com.
>> For more options, visit https://groups.google.com/d/optout.
>>
>> 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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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[evilwulfie]

unplug the ethernet.some USB sources are unable to provide enough
power for everything.

On 11/16/2014 3:47 PM, David Hirst wrote:
>
>
> On Sunday, November 16, 2014 5:39:48 PM UTC-5, David Hirst wrote:
>
>
>
> 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
>
>  
>
> I just tried the same thing without the cape and the same thing
> happens so all that is connected to the BBB is AC, USB and ethernet. 
> uname -a gives "Linux beaglebone 3.8.13 #1 SMP Wed Sep 4 09:09:32 CEST
> 2013 armv7l GNU/Linux"
>
>  
>
>  
>
> "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:*beagl...@googlegroups.com
> [mailto:beagl...@googlegroups.com] *On Behalf Of *David Hirst
> *Sent:* Sunday, November 16, 2014 11:27 AM
> *To:* beagl...@googlegroups.com
> *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
>
> -- 
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the
> Google Groups "BeagleBoard" group.
> To unsubscribe from this group and stop receiving emails from
> it, send an email to beagleboard...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout
> .
>
> 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
>
> -- 
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google
> Groups "BeagleBoard" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to beagleboard+unsubscr...@googlegroups.com
> .
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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[William Hermans]

Yeah, I doubt its the ethernet jack being plugged in and used. I have a
TEMPER USB thermometer plugged in and running, plus ethernet, and USB
networking.

There could be a service on these new images that monitors AC power, so
that it issues a shutdown when this occurs. I know threre is at least "CTRL
+ ALT + DEL" key press combo "event" in /etc/inittab, but have not looked
to see if there is anything else. There could also a a conditional systemd
service potentially doing this.

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[William Hermans]

in /etc/inittab





*# What to do when the power
fails/returns.pf::powerwait:/etc/init.d/powerfail
startpn::powerfailnow:/etc/init.d/powerfail
nowpo::powerokwait:/etc/init.d/powerfail stop*

You need to do some google "research" and see if this is a potential issue
for you.


On Sun, Nov 16, 2014 at 4:49 PM, William Hermans  wrote:

> Yeah, I doubt its the ethernet jack being plugged in and used. I have a
> TEMPER USB thermometer plugged in and running, plus ethernet, and USB
> networking.
>
> There could be a service on these new images that monitors AC power, so
> that it issues a shutdown when this occurs. I know threre is at least "CTRL
> + ALT + DEL" key press combo "event" in /etc/inittab, but have not looked
> to see if there is anything else. There could also a a conditional systemd
> service potentially doing this.
>

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[David Funk]

There is a previous thread, several weeks ago about this same behavior.
That thread involved an application that ran off mains but had battery
backup and everytime mains failed, and 5V goes away, the BBB shutdown.

IIRC, this is a known software default behavior when the 5V goes away, it
is programmable and needs to be set accordingly to how the end user whats
it to behave.


-david
.


On Sun, Nov 16, 2014 at 5:52 PM, William Hermans  wrote:

> in /etc/inittab
>
>
>
>
>
> *# What to do when the power
> fails/returns.pf::powerwait:/etc/init.d/powerfail
> startpn::powerfailnow:/etc/init.d/powerfail
> nowpo::powerokwait:/etc/init.d/powerfail stop*
>
> You need to do some google "research" and see if this is a potential issue
> for you.
>
>
> On Sun, Nov 16, 2014 at 4:49 PM, William Hermans 
> wrote:
>
>> Yeah, I doubt its the ethernet jack being plugged in and used. I have a
>> TEMPER USB thermometer plugged in and running, plus ethernet, and USB
>> networking.
>>
>> There could be a service on these new images that monitors AC power, so
>> that it issues a shutdown when this occurs. I know threre is at least "CTRL
>> + ALT + DEL" key press combo "event" in /etc/inittab, but have not looked
>> to see if there is anything else. There could also a a conditional systemd
>> service potentially doing this.
>>
>
>  --
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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[Michel Gerin]

Hello,
I had a similar problem. David mentions perhaps this thread:

https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64

Bremenpl suggested to use the debian console version instead of the LXDE
version. It solved my problem.

We just encontered a 2 hours mains power outage this saterday.The BBB went
on running flawless with the battery backup.

Michel

2014-11-17 1:09 GMT+01:00 David Funk :

> There is a previous thread, several weeks ago about this same behavior.
> That thread involved an application that ran off mains but had battery
> backup and everytime mains failed, and 5V goes away, the BBB shutdown.
>
> IIRC, this is a known software default behavior when the 5V goes away, it
> is programmable and needs to be set accordingly to how the end user whats
> it to behave.
>
>
> -david
> .
>
>
> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans 
> wrote:
>
>> in /etc/inittab
>>
>>
>>
>>
>>
>> *# What to do when the power
>> fails/returns.pf::powerwait:/etc/init.d/powerfail
>> startpn::powerfailnow:/etc/init.d/powerfail
>> nowpo::powerokwait:/etc/init.d/powerfail stop*
>>
>> You need to do some google "research" and see if this is a potential
>> issue for you.
>>
>>
>> On Sun, Nov 16, 2014 at 4:49 PM, William Hermans 
>> wrote:
>>
>>> Yeah, I doubt its the ethernet jack being plugged in and used. I have a
>>> TEMPER USB thermometer plugged in and running, plus ethernet, and USB
>>> networking.
>>>
>>> There could be a service on these new images that monitors AC power, so
>>> that it issues a shutdown when this occurs. I know threre is at least "CTRL
>>> + ALT + DEL" key press combo "event" in /etc/inittab, but have not looked
>>> to see if there is anything else. There could also a a conditional systemd
>>> service potentially doing this.
>>>
>>
>>  --
>> For more options, visit http://beagleboard.org/discuss
>> ---
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>> "BeagleBoard" group.
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>> email to beagleboard+unsubscr...@googlegroups.com.
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>>
>
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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[Gerald Coley]

Interesting. Sounds like something I need to get fixed.

Gerald

On Monday, November 17, 2014, Michel Gerin  wrote:

> Hello,
> I had a similar problem. David mentions perhaps this thread:
>
> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>
> Bremenpl suggested to use the debian console version instead of the LXDE
> version. It solved my problem.
>
> We just encontered a 2 hours mains power outage this saterday.The BBB went
> on running flawless with the battery backup.
>
> Michel
>
> 2014-11-17 1:09 GMT+01:00 David Funk  >:
>
>> There is a previous thread, several weeks ago about this same behavior.
>> That thread involved an application that ran off mains but had battery
>> backup and everytime mains failed, and 5V goes away, the BBB shutdown.
>>
>> IIRC, this is a known software default behavior when the 5V goes away, it
>> is programmable and needs to be set accordingly to how the end user whats
>> it to behave.
>>
>>
>> -david
>> .
>>
>>
>> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans > > wrote:
>>
>>> in /etc/inittab
>>>
>>>
>>>
>>>
>>>
>>> *# What to do when the power
>>> fails/returns.pf::powerwait:/etc/init.d/powerfail
>>> startpn::powerfailnow:/etc/init.d/powerfail
>>> nowpo::powerokwait:/etc/init.d/powerfail stop*
>>>
>>> You need to do some google "research" and see if this is a potential
>>> issue for you.
>>>
>>>
>>> On Sun, Nov 16, 2014 at 4:49 PM, William Hermans >> > wrote:
>>>
 Yeah, I doubt its the ethernet jack being plugged in and used. I have a
 TEMPER USB thermometer plugged in and running, plus ethernet, and USB
 networking.

 There could be a service on these new images that monitors AC power, so
 that it issues a shutdown when this occurs. I know threre is at least "CTRL
 + ALT + DEL" key press combo "event" in /etc/inittab, but have not looked
 to see if there is anything else. There could also a a conditional systemd
 service potentially doing this.

>>>
>>>  --
>>> For more options, visit http://beagleboard.org/discuss
>>> ---
>>> You received this message because you are subscribed to the Google
>>> Groups "BeagleBoard" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to beagleboard+unsubscr...@googlegroups.com
>>> 
>>> .
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>>
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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[Michel Gerin]

Attn Gerald Coley,

Hello,
In order to avoid any misunderstanding, I wrote "I had a similar problem".
But I didn't use the USB connection.
Only 5V DC and battery were connected to the BBB.
As soon as 5V DC PS was off, the Debian LXDE version was shutting down but
a warning was appearing telling the user the system was shutting down
within 60s if this procedure wasn't canceled.
Maybe David Hirst's problem is related to the same software "mecanism".

Kind regards

Michel.


2014-11-17 12:31 GMT+01:00 Gerald Coley :

> Interesting. Sounds like something I need to get fixed.
>
> Gerald
>
>
> On Monday, November 17, 2014, Michel Gerin  wrote:
>
>> Hello,
>> I had a similar problem. David mentions perhaps this thread:
>>
>> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>>
>> Bremenpl suggested to use the debian console version instead of the LXDE
>> version. It solved my problem.
>>
>> We just encontered a 2 hours mains power outage this saterday.The BBB
>> went on running flawless with the battery backup.
>>
>> Michel
>>
>> 2014-11-17 1:09 GMT+01:00 David Funk :
>>
>>> There is a previous thread, several weeks ago about this same behavior.
>>> That thread involved an application that ran off mains but had battery
>>> backup and everytime mains failed, and 5V goes away, the BBB shutdown.
>>>
>>> IIRC, this is a known software default behavior when the 5V goes away,
>>> it is programmable and needs to be set accordingly to how the end user
>>> whats it to behave.
>>>
>>>
>>> -david
>>> .
>>>
>>>
>>> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans 
>>> wrote:
>>>
 in /etc/inittab





 *# What to do when the power
 fails/returns.pf::powerwait:/etc/init.d/powerfail
 startpn::powerfailnow:/etc/init.d/powerfail
 nowpo::powerokwait:/etc/init.d/powerfail stop*

 You need to do some google "research" and see if this is a potential
 issue for you.


 On Sun, Nov 16, 2014 at 4:49 PM, William Hermans 
 wrote:

> Yeah, I doubt its the ethernet jack being plugged in and used. I have
> a TEMPER USB thermometer plugged in and running, plus ethernet, and USB
> networking.
>
> There could be a service on these new images that monitors AC power,
> so that it issues a shutdown when this occurs. I know threre is at least
> "CTRL + ALT + DEL" key press combo "event" in /etc/inittab, but have not
> looked to see if there is anything else. There could also a a conditional
> systemd service potentially doing this.
>

  --
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>>>
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>>> ---
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>>
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>
>
> --
> Gerald
>
> ger...@beagleboard.org
> http://beagleboard.org/
> http://circuitco.com/support/
>
>  --
> For more options, visit http://beagleboard.org/discuss
> ---
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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[Gerald Coley]

That should be bale to be fixed by changing the behavior of the SW. You can
look at the datasheet for the TPS65217C to see what registers to change.

Gerald

On Mon, Nov 17, 2014 at 8:58 AM, Michel Gerin  wrote:

> Attn Gerald Coley,
>
> Hello,
> In order to avoid any misunderstanding, I wrote "I had a similar problem".
> But I didn't use the USB connection.
> Only 5V DC and battery were connected to the BBB.
> As soon as 5V DC PS was off, the Debian LXDE version was shutting down but
> a warning was appearing telling the user the system was shutting down
> within 60s if this procedure wasn't canceled.
> Maybe David Hirst's problem is related to the same software "mecanism".
>
> Kind regards
>
> Michel.
>
>
> 2014-11-17 12:31 GMT+01:00 Gerald Coley :
>
>> Interesting. Sounds like something I need to get fixed.
>>
>> Gerald
>>
>>
>> On Monday, November 17, 2014, Michel Gerin  wrote:
>>
>>> Hello,
>>> I had a similar problem. David mentions perhaps this thread:
>>>
>>> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>>>
>>> Bremenpl suggested to use the debian console version instead of the LXDE
>>> version. It solved my problem.
>>>
>>> We just encontered a 2 hours mains power outage this saterday.The BBB
>>> went on running flawless with the battery backup.
>>>
>>> Michel
>>>
>>> 2014-11-17 1:09 GMT+01:00 David Funk :
>>>
 There is a previous thread, several weeks ago about this same behavior.
 That thread involved an application that ran off mains but had battery
 backup and everytime mains failed, and 5V goes away, the BBB shutdown.

 IIRC, this is a known software default behavior when the 5V goes away,
 it is programmable and needs to be set accordingly to how the end user
 whats it to behave.


 -david
 .


 On Sun, Nov 16, 2014 at 5:52 PM, William Hermans 
 wrote:

> in /etc/inittab
>
>
>
>
>
> *# What to do when the power
> fails/returns.pf::powerwait:/etc/init.d/powerfail
> startpn::powerfailnow:/etc/init.d/powerfail
> nowpo::powerokwait:/etc/init.d/powerfail stop*
>
> You need to do some google "research" and see if this is a potential
> issue for you.
>
>
> On Sun, Nov 16, 2014 at 4:49 PM, William Hermans 
> wrote:
>
>> Yeah, I doubt its the ethernet jack being plugged in and used. I have
>> a TEMPER USB thermometer plugged in and running, plus ethernet, and USB
>> networking.
>>
>> There could be a service on these new images that monitors AC power,
>> so that it issues a shutdown when this occurs. I know threre is at least
>> "CTRL + ALT + DEL" key press combo "event" in /etc/inittab, but have not
>> looked to see if there is anything else. There could also a a conditional
>> systemd service potentially doing this.
>>
>
>  --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google
> Groups "BeagleBoard" group.
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>>>
>>>  --
>>> For more options, visit http://beagleboard.org/discuss
>>> ---
>>> You received this message because you are subscribed to the Google
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>>>
>>
>>
>> --
>> Gerald
>>
>> ger...@beagleboard.org
>> http://beagleboard.org/
>> http://circuitco.com/support/
>>
>>  --
>> For more options, visit http://beagleboard.org/discuss
>> ---
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-- 
Gerald

ger...@beagleboard.org
http://beagleboard.org/
http://circuitco.com/support/

-- 
For mo

Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[David Hirst]

The fact that it powers down is a problem to me, if for instance a slight 
power interruption occurs ( lets say 5 seconds) during which time the CPU 
is powered by the battery backup I would like to carry on running, if its 
longer then I would like to make the decision when to shutdown. 
As it stands now I have no option but to have the system power down.
With the current implementation In the event of a small interruption, the 
system will start to power down but if that the power has now returned 
prior to the shutdown occurring  the system needs intervention to power 
back up, by power cycling either the USB or AC. I want to smooth out short 
power cycles and let the long power outages re-power the board when the 
power returns


On Monday, November 17, 2014 10:04:21 AM UTC-5, Gerald wrote:
>
> That should be bale to be fixed by changing the behavior of the SW. You 
> can look at the datasheet for the TPS65217C to see what registers to change.
>
> Gerald
>
> On Mon, Nov 17, 2014 at 8:58 AM, Michel Gerin  > wrote:
>
>> Attn Gerald Coley,
>>
>> Hello,
>> In order to avoid any misunderstanding, I wrote "I had a similar 
>> problem". But I didn't use the USB connection.
>> Only 5V DC and battery were connected to the BBB.
>> As soon as 5V DC PS was off, the Debian LXDE version was shutting down 
>> but a warning was appearing telling the user the system was shutting down 
>> within 60s if this procedure wasn't canceled.
>> Maybe David Hirst's problem is related to the same software "mecanism". 
>>
>> Kind regards
>>
>> Michel. 
>>   
>>
>> 2014-11-17 12:31 GMT+01:00 Gerald Coley > >:
>>
>>> Interesting. Sounds like something I need to get fixed.
>>>
>>> Gerald
>>>
>>>
>>> On Monday, November 17, 2014, Michel Gerin >> > wrote:
>>>
 Hello,
 I had a similar problem. David mentions perhaps this thread:

 https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64

 Bremenpl suggested to use the debian console version instead of the 
 LXDE version. It solved my problem. 

 We just encontered a 2 hours mains power outage this saterday.The BBB 
 went on running flawless with the battery backup.

 Michel

 2014-11-17 1:09 GMT+01:00 David Funk :

> There is a previous thread, several weeks ago about this same 
> behavior. That thread involved an application that ran off mains but had 
> battery backup and everytime mains failed, and 5V goes away, the BBB 
> shutdown. 
>
> IIRC, this is a known software default behavior when the 5V goes away, 
> it is programmable and needs to be set accordingly to how the end user 
> whats it to behave.
>
>
> -david
> .
>
>
> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans  
> wrote:
>
>> in /etc/inittab
>>
>>
>>
>>
>>
>> *# What to do when the power 
>> fails/returns.pf::powerwait:/etc/init.d/powerfail 
>> startpn::powerfailnow:/etc/init.d/powerfail 
>> nowpo::powerokwait:/etc/init.d/powerfail stop*
>>
>> You need to do some google "research" and see if this is a potential 
>> issue for you.
>>
>>
>> On Sun, Nov 16, 2014 at 4:49 PM, William Hermans  
>> wrote:
>>
>>> Yeah, I doubt its the ethernet jack being plugged in and used. I 
>>> have a TEMPER USB thermometer plugged in and running, plus ethernet, 
>>> and 
>>> USB networking.
>>>
>>> There could be a service on these new images that monitors AC power, 
>>> so that it issues a shutdown when this occurs. I know threre is at 
>>> least 
>>> "CTRL + ALT + DEL" key press combo "event" in /etc/inittab, but have 
>>> not 
>>> looked to see if there is anything else. There could also a a 
>>> conditional 
>>> systemd service potentially doing this.
>>>
>>
>>  -- 
>> For more options, visit http://beagleboard.org/discuss
>> --- 
>> You received this message because you are subscribed to the Google 
>> Groups "BeagleBoard" group.
>> To unsubscribe from this group and stop receiving emails from it, 
>> send an email to beagleboard+unsubscr...@googlegroups.com.
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>  -- 
> For more options, visit http://beagleboard.org/discuss
> --- 
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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[Gerald Coley]

Then the SW needs to be changed to change that behavior.

Gerald


On Tue, Nov 18, 2014 at 10:37 AM, David Hirst  wrote:

> The fact that it powers down is a problem to me, if for instance a slight
> power interruption occurs ( lets say 5 seconds) during which time the CPU
> is powered by the battery backup I would like to carry on running, if its
> longer then I would like to make the decision when to shutdown.
> As it stands now I have no option but to have the system power down.
> With the current implementation In the event of a small interruption, the
> system will start to power down but if that the power has now returned
> prior to the shutdown occurring  the system needs intervention to power
> back up, by power cycling either the USB or AC. I want to smooth out short
> power cycles and let the long power outages re-power the board when the
> power returns
>
>
> On Monday, November 17, 2014 10:04:21 AM UTC-5, Gerald wrote:
>>
>> That should be bale to be fixed by changing the behavior of the SW. You
>> can look at the datasheet for the TPS65217C to see what registers to change.
>>
>> Gerald
>>
>> On Mon, Nov 17, 2014 at 8:58 AM, Michel Gerin  wrote:
>>
>>> Attn Gerald Coley,
>>>
>>> Hello,
>>> In order to avoid any misunderstanding, I wrote "I had a similar
>>> problem". But I didn't use the USB connection.
>>> Only 5V DC and battery were connected to the BBB.
>>> As soon as 5V DC PS was off, the Debian LXDE version was shutting down
>>> but a warning was appearing telling the user the system was shutting down
>>> within 60s if this procedure wasn't canceled.
>>> Maybe David Hirst's problem is related to the same software "mecanism".
>>>
>>> Kind regards
>>>
>>> Michel.
>>>
>>>
>>> 2014-11-17 12:31 GMT+01:00 Gerald Coley :
>>>
 Interesting. Sounds like something I need to get fixed.

 Gerald


 On Monday, November 17, 2014, Michel Gerin  wrote:

> Hello,
> I had a similar problem. David mentions perhaps this thread:
>
> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>
> Bremenpl suggested to use the debian console version instead of the
> LXDE version. It solved my problem.
>
> We just encontered a 2 hours mains power outage this saterday.The BBB
> went on running flawless with the battery backup.
>
> Michel
>
> 2014-11-17 1:09 GMT+01:00 David Funk :
>
>> There is a previous thread, several weeks ago about this same
>> behavior. That thread involved an application that ran off mains but had
>> battery backup and everytime mains failed, and 5V goes away, the BBB
>> shutdown.
>>
>> IIRC, this is a known software default behavior when the 5V goes
>> away, it is programmable and needs to be set accordingly to how the end
>> user whats it to behave.
>>
>>
>> -david
>> .
>>
>>
>> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans 
>> wrote:
>>
>>> in /etc/inittab
>>>
>>>
>>>
>>>
>>>
>>> *# What to do when the power
>>> fails/returns.pf::powerwait:/etc/init.d/powerfail
>>> startpn::powerfailnow:/etc/init.d/powerfail
>>> nowpo::powerokwait:/etc/init.d/powerfail stop*
>>>
>>> You need to do some google "research" and see if this is a potential
>>> issue for you.
>>>
>>>
>>> On Sun, Nov 16, 2014 at 4:49 PM, William Hermans 
>>> wrote:
>>>
 Yeah, I doubt its the ethernet jack being plugged in and used. I
 have a TEMPER USB thermometer plugged in and running, plus ethernet, 
 and
 USB networking.

 There could be a service on these new images that monitors AC
 power, so that it issues a shutdown when this occurs. I know threre is 
 at
 least "CTRL + ALT + DEL" key press combo "event" in /etc/inittab, but 
 have
 not looked to see if there is anything else. There could also a a
 conditional systemd service potentially doing this.

>>>
>>>  --
>>> For more options, visit http://beagleboard.org/discuss
>>> ---
>>> You received this message because you are subscribed to the Google
>>> Groups "BeagleBoard" group.
>>> To unsubscribe from this group and stop receiving emails from it,
>>> send an email to beagleboard+unsubscr...@googlegroups.com.
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>>
>>  --
>> For more options, visit http://beagleboard.org/discuss
>> ---
>> You received this message because you are subscribed to the Google
>> Groups "BeagleBoard" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> send an email to beagleboard+unsubscr...@googlegroups.com.
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>>
>
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> ---
> You received this message bec

Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[dhirst]

I guess a rebuild is in order, I did the same test with Debian and saw the 
same result, except that with Debian a message is posted to the console 
explaining that shutdown is occurring due to loss of AC power

On Tuesday, November 18, 2014 1:57:47 PM UTC-5, Gerald wrote:
>
> Then the SW needs to be changed to change that behavior.
>
> Gerald
>
>
> On Tue, Nov 18, 2014 at 10:37 AM, David Hirst  > wrote:
>
>> The fact that it powers down is a problem to me, if for instance a slight 
>> power interruption occurs ( lets say 5 seconds) during which time the CPU 
>> is powered by the battery backup I would like to carry on running, if its 
>> longer then I would like to make the decision when to shutdown. 
>> As it stands now I have no option but to have the system power down.
>> With the current implementation In the event of a small interruption, the 
>> system will start to power down but if that the power has now returned 
>> prior to the shutdown occurring  the system needs intervention to power 
>> back up, by power cycling either the USB or AC. I want to smooth out short 
>> power cycles and let the long power outages re-power the board when the 
>> power returns
>>
>>
>> On Monday, November 17, 2014 10:04:21 AM UTC-5, Gerald wrote:
>>>
>>> That should be bale to be fixed by changing the behavior of the SW. You 
>>> can look at the datasheet for the TPS65217C to see what registers to change.
>>>
>>> Gerald
>>>
>>> On Mon, Nov 17, 2014 at 8:58 AM, Michel Gerin  
>>> wrote:
>>>
 Attn Gerald Coley,

 Hello,
 In order to avoid any misunderstanding, I wrote "I had a similar 
 problem". But I didn't use the USB connection.
 Only 5V DC and battery were connected to the BBB.
 As soon as 5V DC PS was off, the Debian LXDE version was shutting down 
 but a warning was appearing telling the user the system was shutting down 
 within 60s if this procedure wasn't canceled.
 Maybe David Hirst's problem is related to the same software "mecanism". 

 Kind regards

 Michel. 
   

 2014-11-17 12:31 GMT+01:00 Gerald Coley :

> Interesting. Sounds like something I need to get fixed.
>
> Gerald
>
>
> On Monday, November 17, 2014, Michel Gerin  wrote:
>
>> Hello,
>> I had a similar problem. David mentions perhaps this thread:
>>
>> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>>
>> Bremenpl suggested to use the debian console version instead of the 
>> LXDE version. It solved my problem. 
>>
>> We just encontered a 2 hours mains power outage this saterday.The BBB 
>> went on running flawless with the battery backup.
>>
>> Michel
>>
>> 2014-11-17 1:09 GMT+01:00 David Funk :
>>
>>> There is a previous thread, several weeks ago about this same 
>>> behavior. That thread involved an application that ran off mains but 
>>> had 
>>> battery backup and everytime mains failed, and 5V goes away, the BBB 
>>> shutdown. 
>>>
>>> IIRC, this is a known software default behavior when the 5V goes 
>>> away, it is programmable and needs to be set accordingly to how the end 
>>> user whats it to behave.
>>>
>>>
>>> -david
>>> .
>>>
>>>
>>> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans  
>>> wrote:
>>>
 in /etc/inittab





 *# What to do when the power 
 fails/returns.pf::powerwait:/etc/init.d/powerfail 
 startpn::powerfailnow:/etc/init.d/powerfail 
 nowpo::powerokwait:/etc/init.d/powerfail stop*

 You need to do some google "research" and see if this is a 
 potential issue for you.


 On Sun, Nov 16, 2014 at 4:49 PM, William Hermans >>> > wrote:

> Yeah, I doubt its the ethernet jack being plugged in and used. I 
> have a TEMPER USB thermometer plugged in and running, plus ethernet, 
> and 
> USB networking.
>
> There could be a service on these new images that monitors AC 
> power, so that it issues a shutdown when this occurs. I know threre 
> is at 
> least "CTRL + ALT + DEL" key press combo "event" in /etc/inittab, but 
> have 
> not looked to see if there is anything else. There could also a a 
> conditional systemd service potentially doing this.
>

  -- 
 For more options, visit http://beagleboard.org/discuss
 --- 
 You received this message because you are subscribed to the Google 
 Groups "BeagleBoard" group.
 To unsubscribe from this group and stop receiving emails from it, 
 send an email to beagleboard+unsubscr...@googlegroups.com.
 For more options, visit https://groups.google.com/d/optout.

>>>
>>>  -- 
>>> For more options, visit http://beagleboard

Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[dhirst]

in /drivers/mfd/tps65217.c  i believe this is where the magic happens, and 
needs to be changed


 if (int_reg & TPS65217_INT_PBI) { 
 /* Handle push button */ 
 dev_dbg(tps->dev, "power button status change\n"); 
   input_report_key(tps->pwr_
but, KEY_POWER, 
 status_reg & TPS65217_STATUS_PB); 
 input_sync(tps->pwr_but); 
 } 
 if (int_reg & TPS65217_INT_ACI) { 
 /* Handle AC power status change */ 



On Tuesday, November 18, 2014 1:57:47 PM UTC-5, Gerald wrote:
>
> Then the SW needs to be changed to change that behavior.
>
> Gerald
>
>
> On Tue, Nov 18, 2014 at 10:37 AM, David Hirst  > wrote:
>
>> The fact that it powers down is a problem to me, if for instance a slight 
>> power interruption occurs ( lets say 5 seconds) during which time the CPU 
>> is powered by the battery backup I would like to carry on running, if its 
>> longer then I would like to make the decision when to shutdown. 
>> As it stands now I have no option but to have the system power down.
>> With the current implementation In the event of a small interruption, the 
>> system will start to power down but if that the power has now returned 
>> prior to the shutdown occurring  the system needs intervention to power 
>> back up, by power cycling either the USB or AC. I want to smooth out short 
>> power cycles and let the long power outages re-power the board when the 
>> power returns
>>
>>
>> On Monday, November 17, 2014 10:04:21 AM UTC-5, Gerald wrote:
>>>
>>> That should be bale to be fixed by changing the behavior of the SW. You 
>>> can look at the datasheet for the TPS65217C to see what registers to change.
>>>
>>> Gerald
>>>
>>> On Mon, Nov 17, 2014 at 8:58 AM, Michel Gerin  
>>> wrote:
>>>
 Attn Gerald Coley,

 Hello,
 In order to avoid any misunderstanding, I wrote "I had a similar 
 problem". But I didn't use the USB connection.
 Only 5V DC and battery were connected to the BBB.
 As soon as 5V DC PS was off, the Debian LXDE version was shutting down 
 but a warning was appearing telling the user the system was shutting down 
 within 60s if this procedure wasn't canceled.
 Maybe David Hirst's problem is related to the same software "mecanism". 

 Kind regards

 Michel. 
   

 2014-11-17 12:31 GMT+01:00 Gerald Coley :

> Interesting. Sounds like something I need to get fixed.
>
> Gerald
>
>
> On Monday, November 17, 2014, Michel Gerin  wrote:
>
>> Hello,
>> I had a similar problem. David mentions perhaps this thread:
>>
>> https://mail.google.com/mail/u/0/?tab=wm#inbox/149198bbf7826f64
>>
>> Bremenpl suggested to use the debian console version instead of the 
>> LXDE version. It solved my problem. 
>>
>> We just encontered a 2 hours mains power outage this saterday.The BBB 
>> went on running flawless with the battery backup.
>>
>> Michel
>>
>> 2014-11-17 1:09 GMT+01:00 David Funk :
>>
>>> There is a previous thread, several weeks ago about this same 
>>> behavior. That thread involved an application that ran off mains but 
>>> had 
>>> battery backup and everytime mains failed, and 5V goes away, the BBB 
>>> shutdown. 
>>>
>>> IIRC, this is a known software default behavior when the 5V goes 
>>> away, it is programmable and needs to be set accordingly to how the end 
>>> user whats it to behave.
>>>
>>>
>>> -david
>>> .
>>>
>>>
>>> On Sun, Nov 16, 2014 at 5:52 PM, William Hermans  
>>> wrote:
>>>
 in /etc/inittab





 *# What to do when the power 
 fails/returns.pf::powerwait:/etc/init.d/powerfail 
 startpn::powerfailnow:/etc/init.d/powerfail 
 nowpo::powerokwait:/etc/init.d/powerfail stop*

 You need to do some google "research" and see if this is a 
 potential issue for you.


 On Sun, Nov 16, 2014 at 4:49 PM, William Hermans >>> > wrote:

> Yeah, I doubt its the ethernet jack being plugged in and used. I 
> have a TEMPER USB thermometer plugged in and running, plus ethernet, 
> and 
> USB networking.
>
> There could be a service on these new images that monitors AC 
> power, so that it issues a shutdown when this occurs. I know threre 
> is at 
> least "CTRL + ALT + DEL" key press combo "event" in /etc/inittab, but 
> have 
> not looked to see if there is anything else. There could also a a 
> conditional systemd service potentially doing this.
>

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[toni incog]

I like this behaviour and thought I could use it to cleanly shutdown the 
bbb. I therefore connected a 'powerbar' usb battery to the usb otg port. 
Now when I remove the 5V (strangely called ac) I expect a clean shutdown on 
power delivered by my cheap 'ups'. Only I find out that in /this/ case the 
bbb shutdown immediate instead of a clean shutdown!

So there seams to be a difference in connecting the otg usb to a pc or just 
to a powerbar.

Anyone who can explain this behaviour? In my quest to shutdown a bbb 
simple, cheap and clean.

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RE: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[William Pretty Security]

There is a signal, on P9 I believe, called “power”. 

If you pull this pin low with a pushbutton switch, you will get the clean 
shutdown you are looking for.

 

 

 

"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

http://ca.linkedin.com/pub/bill-pretty/2b/b07/602

 

 

From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of toni incog
Sent: Wednesday, February 25, 2015 12:34 PM
To: beagleboard@googlegroups.com
Cc: dhi...@schneiderdcim.com
Subject: Re: [beagleboard] BeagleBone Black powers down when AC adapter is 
removed while the USB is connected.

 

I like this behaviour and thought I could use it to cleanly shutdown the bbb. I 
therefore connected a 'powerbar' usb battery to the usb otg port. Now when I 
remove the 5V (strangely called ac) I expect a clean shutdown on power 
delivered by my cheap 'ups'. Only I find out that in /this/ case the bbb 
shutdown immediate instead of a clean shutdown!

So there seams to be a difference in connecting the otg usb to a pc or just to 
a powerbar.

Anyone who can explain this behaviour? In my quest to shutdown a bbb simple, 
cheap and clean.

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  _  

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5646 / Virus Database: 4299/9178 - Release Date: 02/25/15

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[toni incog]

Yes indeed, and that is a perfect way to shut down our baby. It's another 
way of pressing the power button. Thing is you need another 10 sec. of 
shutdown power (to cleanly shutdown).

So I'm looking for the use case where somebody stupid (talking 'bout me) 
yanks the 5V and I still get a clean shutdown. We need external 'ups' power 
for that last 10 sec. of shutdown. Now I keep 5V always on. Till power 
company screws up. 64 million dollar question: how many times can power 
company screw up before bbb screws up?

Question remains why I get a unclean shutdow with me (the stupid one) 
feeding 5v to otg usb with powerbar and getting clean shutdown when 
connected to regular pc. 

Call me stupid but the correct answer awaits tickets for the next frank 
zappa concert!

thx,
Michiel 

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[Harvey White]

On Wed, 25 Feb 2015 15:51:21 -0800 (PST), you wrote:

>Yes indeed, and that is a perfect way to shut down our baby. It's another 
>way of pressing the power button. Thing is you need another 10 sec. of 
>shutdown power (to cleanly shutdown).

That's possible with a backup supply, NIMH/NICD with a resistor to
charge and a diode to prevent overcharge, if you have a cutoff when
the batteries reach 1.1 volts, you're fine.  I'd suggest a 1 farad
capacitor, but the BBB wants several hundred mills when running, and I
suspect that's a bit much.

>
>So I'm looking for the use case where somebody stupid (talking 'bout me) 
>yanks the 5V and I still get a clean shutdown. We need external 'ups' power 
>for that last 10 sec. of shutdown. Now I keep 5V always on. Till power 
>company screws up. 64 million dollar question: how many times can power 
>company screw up before bbb screws up?

Ok, comparator and you shut down (gracefully) when the DC power goes
away.  Problem is to determine that (if you're also battery
powered this is good)

>
>Question remains why I get a unclean shutdow with me (the stupid one) 
>feeding 5v to otg usb with powerbar and getting clean shutdown when 
>connected to regular pc. 

May have to do with how the power is actually disconnected, clean off
vs make/break/make/break by disconnecting

>
>Call me stupid but the correct answer awaits tickets for the next frank 
>zappa concert!

*or is that a *sears* poncho?*

Harvey

>
>thx,
>Michiel 

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[toni incog]

On Thursday, February 26, 2015 at 1:33:01 AM UTC+1, Harvey White wrote:
>
> On Wed, 25 Feb 2015 15:51:21 -0800 (PST), you wrote: 
>
> >Yes indeed, and that is a perfect way to shut down our baby. It's another 
> >way of pressing the power button. Thing is you need another 10 sec. of 
> >shutdown power (to cleanly shutdown). 
>
> That's possible with a backup supply, NIMH/NICD with a resistor to 
> charge and a diode to prevent overcharge, if you have a cutoff when 
> the batteries reach 1.1 volts, you're fine.  I'd suggest a 1 farad 
> capacitor, but the BBB wants several hundred mills when running, and I 
> suspect that's a bit much. 
>
> Yeah 1 Farad is not enough to shutdown clean.
 

> > 
> >So I'm looking for the use case where somebody stupid (talking 'bout me) 
> >yanks the 5V and I still get a clean shutdown. We need external 'ups' 
> power 
> >for that last 10 sec. of shutdown. Now I keep 5V always on. Till power 
> >company screws up. 64 million dollar question: how many times can power 
> >company screw up before bbb screws up? 
>
> Ok, comparator and you shut down (gracefully) when the DC power goes 
> away.  Problem is to determine that (if you're also battery 
> powered this is good) 
>

reading ten times, no comprending. Do you no who you are? You aint what 
your not. And that al there is. 

>
> > 
> >Question remains why I get a unclean shutdow with me (the stupid one) 
> >feeding 5v to otg usb with powerbar and getting clean shutdown when 
> >connected to regular pc. 
>
> May have to do with how the power is actually disconnected, clean off 
> vs make/break/make/break by disconnecting 
>

Ok. Could be. But it think it's hard & propably software. Don't believe in 
statistics on average.
 

>
> > 
> >Call me stupid but the correct answer awaits tickets for the next frank 
> >zappa concert! 
>
> *or is that a *sears* poncho?* 
>
> Harvey 
>
>
I guess: in serious leather!

Thanks and sorry for zappian confusion, questions still stands:
 

> > 
> >thx, 
> >Michiel 
>
>

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RE: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[William Pretty Security]

The BBB has a battery backup connector on it you might want to look into ?

 

 

"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

http://ca.linkedin.com/pub/bill-pretty/2b/b07/602

 

 

From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of toni incog
Sent: Wednesday, February 25, 2015 6:51 PM
To: beagleboard@googlegroups.com
Subject: Re: [beagleboard] BeagleBone Black powers down when AC adapter is 
removed while the USB is connected.

 

Yes indeed, and that is a perfect way to shut down our baby. It's another way 
of pressing the power button. Thing is you need another 10 sec. of shutdown 
power (to cleanly shutdown).

So I'm looking for the use case where somebody stupid (talking 'bout me) yanks 
the 5V and I still get a clean shutdown. We need external 'ups' power for that 
last 10 sec. of shutdown. Now I keep 5V always on. Till power company screws 
up. 64 million dollar question: how many times can power company screw up 
before bbb screws up?

Question remains why I get a unclean shutdow with me (the stupid one) feeding 
5v to otg usb with powerbar and getting clean shutdown when connected to 
regular pc. 

Call me stupid but the correct answer awaits tickets for the next frank zappa 
concert!

thx,
Michiel 

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  _  

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5646 / Virus Database: 4299/9178 - Release Date: 02/25/15

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Re: [beagleboard] BeagleBone Black powers down when AC adapter is removed while the USB is connected.

[toni incog]

Yeah, you probably mean this:

https://plus.google.com/+DrewFustini/posts/jUkFsbVJVHQ

Apart from some highly regarded bb'ners advising against it I'm not looking 
for battery backup. I'm looking for easy automatic clean shutdown (aka 
eacs). 
In the plc world they're using a super capacitor to do the clean shutdown 
(and save some data to flash). 
 
I was hoping that with power supplied to the usb otg port I had an easy 
solution. Now it seems I have to make a momentary switch to short pwr_but 
for lees than 8 sec. or program a gpio to shut down the bbb when power is 
removed.

Unless I understand why the bbb is shutting down clean with usb otg 
connected to pc but not when usb otg connected to a battery. Comments 
appreciated!

thx,
Michiel

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