Angus McKnight wrote:
> Hi there,
> I am using an APC SmartUps 1000 via a USB cable and have configured
> it to run with apcupsd.
> It generally works well, upon power failure, the computer initiates
> shutdown. Upon shutdown the UPS is triggered to switch off some
> seconds after shutdown is complete. If power is restored some
> minutes later then the UPS switches on again and the computer starts
> The problem occurs when power is restored rapidly after the computer
> is shut down but before the UPS switches off. At this point, the UPS
> sees that power is restored and keeps running happily, but the
> computer is shut down and since there has been no power off/on cycle
> to the computer it does not start up again.
This is a classic issue. Many UPSes ignore the killpower command if line
power is present. This is frustrating because it causes exactly the issue
you describe. I /thought/ Smart-UPS models would turn off momentarily in
this situation in order to ensure the server is rebooted, but your
observation seems to disprove this. There are multiple commands possible to
shut down a Smart-UPS. I'll try to make some time to test and see what my
UPSes do in this situation with the different commands.