Automatically Restart PC After UPS Controlled Shutdown?

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  • Last Post 21 March 2014
CasualSurveyor posted this 21 March 2014

In the BIOS of my home automation PC (which is also my home theater PC), I have it set to automatically restart the computer after a power loss. However I also have the PC on a UPS, which will execute a controlled shutdown of the PC when there is 5 minutes of battery power remaining.

Problem: I was recently traveling on an extended overseas business trip. There was a lengthy power outage at my home, so the UPS ran down and shut off the PC in an orderly manner. When the power came back on, the PC did not restart.

Ideas or suggestions on why not? The loss of home automation was a problem for my wife, who had to go around and put all the lamps on standard outlets because she didn't know why the automation system wasn't working. When I go home, all that needed to be done was to turn the PC back on, but she didn't know that and didn't want to bother me with troubleshooting while I was traveling.

Wondering if others have encountered this situation and what solutions have been found.


The option to "turn on" after power loss doesn't apply when the PC is shut off gracefully by the UPS. You'd probably be better off letting the power cut out completely to get it to come back on when the power is restored. Optionally, you could look into a wake on lan (WOL) service.... perhaps something you could activate remotely to get the computer back up.

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Ryan-Scott posted this 21 March 2014

In the BIOS of my home automation PC (which is also my home theater PC), I have it set to automatically restart the computer after a power loss. However I also have the PC on a UPS, which will execute a controlled shutdown of the PC when there is 5 minutes of battery power remaining.

Problem: I was recently traveling on an extended overseas business trip. There was a lengthy power outage at my home, so the UPS ran down and shut off the PC in an orderly manner. When the power came back on, the PC did not restart.

Ideas or suggestions on why not? The loss of home automation was a problem for my wife, who had to go around and put all the lamps on standard outlets because she didn't know why the automation system wasn't working. When I go home, all that needed to be done was to turn the PC back on, but she didn't know that and didn't want to bother me with troubleshooting while I was traveling.

Wondering if others have encountered this situation and what solutions have been found.


The option to "turn on" after power loss doesn't apply when the PC is shut off gracefully by the UPS. You'd probably be better off letting the power cut out completely to get it to come back on when the power is restored. Optionally, you could look into a wake on lan (WOL) service.... perhaps something you could activate remotely to get the computer back up.

monkey-magic posted this 21 March 2014

I had a similar issue with a Server at work. Because it shutsdown gracefully it won't boot back up as it hasn't experienced a power loss. I'm not a fan of just letting it lose power. The suggestions I received were:

1) WOL like Ryan mentioned
2) Have the Bios set to power on every day at a certain time, at least it will power back on within 24 hours at most.
3) Have another low power PC set to turn it on (Like a raspberry Pi).

Josh

CasualSurveyor posted this 21 March 2014

Thanks for the information and suggestions.

Upon further research, I believe that the behavior of the consumer-grade APC UPS is as follows:

1. Power is lost.
2. UPS keeps supplying power to the PC.
3. At the power reserve setting specified in the PowerChute Personal Edition software, for example 5%, the software initiates an orderly shutdown of the PC.
4. The UPS then disconnects the load and goes into a power-saving mode to prevent total draining of the battery.
5. Upon restoration of power, the UPS recharges its battery and re-connects the load to the inverter output.

Therefore, the PC should restart if the BIOS is set to "Always On" / "Power On" or even "Last State" if the PC was left running.

I checked my BIOS settings and to my surprise, it was set to Power Off. So the PC never rebooted when the power came back. I have no idea how the BIOS setting changed...I have not been in the BIOS for months.

Here is some information from Schneider Electric:

http://www.schneider-electric.us/sites/us/en/support/faq/faqmain.page?page=content&country=ITB&lang=EN&id=FA159550&redirect=true

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