coming back up after power failure (UPS)

[James Long]

> Pre Y2K PC's had mechanical power on button which stayed in the "on
> position" no matter what was happening with the line power. Those
> pcs are what UPS units were first designed for, so after the UPS
> does normal shutdown at power loss, pc will reboot when power comes
> back on.
>
> Newer PC's now have motherboard power control which goes to the
> power off position on losing line power. Some of these pc's have
> bios setting to deactivate this function so after line power loss
> the pc will reboot on power return. This is common on motherboards
> marketed for servers.
>
> Motherboards marketed for home desktop pcs may not have this bios
> option. You could open the box and cut the 2 wires leading from the
> power on button and connect then together so the motherboard always
> thinks the power on button is depressed. (do this at your own risk)

You missed the point.

If the system does NOT power itself down, but instead sits at the
"press any key to reboot" prompt, then playing with the NUT configuration
isn't going to improve anything in cases where power returns before
batteries are drained.  The OP would have to troubleshoot his inability
to get the machine to power off upon a line outage, which it appears
he has done.