[Nut-upsuser] Overriding battery.runtime.low

Charles Lepple
Wed, 24 Feb 2021 14:03:09 -0000

On Feb 24, 2021, at 4:02 AM, Peter Bishop via Nut-upsuser <nut-upsuser at
alioth-lists.debian.net> wrote:
>
> I have an APC BR1500GI and want to run my devices for the longest possible
period. Consequently I want to use the battery.runtime.low setting, sufficient
to allow my devices to shutdown. The APC has a setting of 5 minutes for this
purpose but I want to change this to 10 minutes, so have added the
?override.battery.runtime.low = 600? setting to the ups.conf file. However, this
override doesn?t appear to be causing the NUT setup to initiate a shutdown.
>
> Does the ?override.battery.runtime.low? work for this purpose or does it
just change the value being displayed by upsc? If it?s the latter, is there a
way to achieve the override for the low battery setting? For testing purposes I
changed this value to ?2500?, switched off the mains, and monitored the
?battery.runtime? value. It dropped below ?2500? (and remained there) but the
?battery is low? message was never generated.

The override.* settings can cover both cases. If you just provide
override.battery.runtime.low, you are just replacing what is sent from the
driver to upsd, and then on to clients like upsc. (In particular, this
doesn't send any settings adjustments back to the UPS.) Since upsmon is
watching ups.status for the UPS-provided LB bit (by default), this isn't
sufficient to modify shutdown behavior.

The subtle difference in examples like this:

   https://alioth-lists.debian.net/pipermail/nut-upsuser/2020-August/011977.html

is the use of "ignorelb" in concert with
"override.battery.runtime.low".

I also ran across this thread while looking up info on the BR1500GI:


https://alioth-lists.debian.net/pipermail/nut-upsuser/2020-November/012172.html

I don't think we resolved the shutdown issue (or got debug logs to dig
deeper).

>
> Required information:
>
>                 OS: Linux **** 5.4.83+ #1379 Mon Dec 14 13:06:05 GMT 2020
armv6l GNU/Linux
>                 NUT version: 2.7.4-8
>                 NUT installation: package
>                 UPS: APC BR1500GI

Thanks, appreciate the info!

>
> Thanks.
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