[Nut-upsuser] reboot of nut managment node resets Tripplite SMX1000LCD

Yogesh Bhanu yogesh.bhanu at gmail.com
Fri Jun 26 14:14:04 BST 2020

Hi Roger et.al,

The shutdown /reset of UPS is near instantaneous after rpi reboots or
switches off.
FWIW -- It looks like something is off with Ubuntu 20.04  --  I tried
with raspbian and arch linux using the same nut configuration  on the
same hardware and  the UPS does not reset.

I have repurposed an old rpi2 to act as a nut server.

Thanks Roger.


On Mon, Jun 22, 2020 at 11:33 AM Roger Price <roger at rogerprice.org> wrote:
> On Mon, 22 Jun 2020, Yogesh Bhanu wrote:
> > I'm not sure if it is a bug or a feature.
> >
> > I'm running Ubuntu 20.04 on my RPi4 which connects to the UPS over USB.
> > I have noticed whenever  I reboot my RPi4. It resets the UPS ( I can
> > hear the relay)  -- Powerloss.
> > Any pointers to disable this annoying bug / feature.
> It looks as if the shutdown part of the reboot is issuing a "delayed UPS
> shutdown".   You should be able to see this in the log.   The UPS will then turn
> off it's power outlets say 20 seconds later when the RPi4 has already restarted.
> Ways to avoid this:
> 1. Remove wall power and wait to hear the "clunk" of the relay.  Then restore
> wall power.
> 2. Stop nut.server before rebooting the RPi4.  This could happen in a script.
> Roger
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