Nut upsuser - Jun 2020 - reboot of nut managment node resets Tripplite SMX1000LCD

Hi,

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.

ups.conf:
--8<----
[tripp]
    driver = usbhid-ups
    port = auto
    vendorid = 09ae
    productid = 2009
    bus = 001
    desc = "Tripp Lite SMX1000LCD"
-->8----

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

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.

Yogesh


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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