[Nut-upsuser] APC UPS won't restart after power outage

[Ole Hoppe]

Sent an inquiry to APC tech support for detailed technical documentation 
for driver developers about the commands the UPS supports. This is the 
most usable part of the reply I got:

> PowerChute Personal Edition default shutdown time line:
> 1. UPS goes to battery and PCPE starts its preserve battery power counter.
>
> 2. When the counter expires it sends a command to the UPS to start 
> counting its turn off delay and then commands the OS to shutdown.
>
> 3. The operating system shuts down and the UPS continues to count its 
> turn off delay. (Once the UPS finishes counting its turn off delay it 
> will reboot and nothing can stop this from happening.)
>
> 4. The UPS cuts power to the outlets then rechecks to see if the 
> incoming power is acceptable. If it is not it waits there until power 
> returns.
>
> 5. If the UPS went to battery due to a brown out the unit at this 
> point will be in LVSM until the voltage becomes acceptable again.

Of course they want you to purchase their PowerChute for Linux, so this 
is of course not satisfactory. But maybe you can extract another 
alternative to instruct the UPS for a shutdown/reboot?

Would it be of help if you got the driver's complete dump?

Thank you again for your efforts!

Kind regards
Ole