[Nut-upsuser] No shutdown on empty battery

Gerhard Strangar g.s at arcor.de
Wed Feb 1 16:09:32 UTC 2012

Arnaud Quette wrote (2012-01-31 12:38):

>> Jan  9 05:37:07 b1 upsmon[67752]: UPS upsb1 at localhost on battery
>> Jan  9 06:15:19 b1 syslogd: kernel boot file is /boot/kernel/kernel
> as told above, being on battery is not sufficient to trigger a system
> shutdown...

The "boot file" line means that the system rebooted. And after reboot,
the /etc/kill-power file still existed, so I guess it did not work properly.

> a good test to do is:
> - to shutdown your computer and unplug it from the UPS. You may want
> to put a light bulb on the UPS instead of the computer,
> - restart everything, then issue a power failure,
> - check that NUT sees both OB (on battery) and most of LB (low
> battery) flags in ups.status.
> upsmon will also notify you, as you've already seen.

I'll try to do that with a second UPS. But I thought maybe someone else
is using a Powerware 5 series with nut and he could tell me if it works
or not.

What I don't understand is, why "low battery" is used for shutdown.
neither nut nor the UPS know how long it takes to properly shutdown the
system, so why wait until it might be too late?

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