[Nut-upsuser] POWERCOM UPS USB : UPS Shutdown

[Alexey Korobeinikov]

I observed this behavior with several Powercom UPSs (BNT 400/600/1000) 
new and old on different computers. It didn't matter. Even replacing USB 
cables or switching to another port didn't give stable results. Only 
usbreset and immediately restarting/starting the service gave about 90% 
result. Therefore, I slightly changed the startup script in the system 
so that if the required VendorID:DeviceID was available, this port would 
be restarted and NUT would be started immediately.

16.05.2025 11:16, Jim Klimov:
> Well, it is always (quite) possible that the hardware is... subpar, 
> leading to loss of connection.
>
> Try a different USB port (maybe on a different MoBo hub if there's a 
> choice), different cable (check if you have a shielded/grounded one to 
> minimize EMI noise), revise if there are any motors (fridges, 
> dishwashers) or luminescent lighting starters etc. nearby on the 
> electric line and physically near the cabling, etc.
>
> Maybe there is some vendor-provided way to update the UPS firmware?
>
> You mentioned the device may be from 2017 - maybe it collected a lot 
> of dust over time and just overheats or has random static discharge 
> inside - so some internal physical maintenance with a toothbrush, 
> vacuum cleaner, and proper electrotechnical hygiene for your safety 
> could also do wonders? On similar note, is the battery also as old? 
> PbAc tend to not live that long, maybe replacing it could stabilize 
> things.
>
> Jim
>
>
> On Fri, May 16, 2025 at 9:41 AM Alexey Korobeinikov 
> <alexey at fseafood.com> wrote:
>
>     On Devuan Linux daedalus (no systemd).
>     I try to manualy start nut-service or just usbhid-ups drivers. I
>     have observed such problems before.They were solved by usbreset on
>     this device (0d9f:0004) andimmediately launchnut-service/drivers.
>     But sometimes it wasn't necessary to do that.
>
>
>     16.05.2025 00:01, Jim Klimov:
>>     Are you on Linux? Did you check if NDE created a service instance
>>     like `nut-driver at UPS` that starts automatically and your manually
>>     started driver instance tries to steal from it?
>>
>>     *
>>     https://github.com/networkupstools/nut/wiki/nut%E2%80%90driver%E2%80%90enumerator-(NDE)
>>
>>     Jim
>
>     -- 
>     З Повагою
>     Коробейніков Олексій
>     Системний адміністратор
>
>     ТОВ "Флагман Сіфуд"
>     вул. Броварська 152, смт Велика Димерка
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>

-- 
З Повагою
Коробейніков Олексій
Системний адміністратор

ТОВ "Флагман Сіфуд"
вул. Броварська 152, смт Велика Димерка
Київська область, 07442
р.+38 044 495-88-00
вн.6101
м.+38 067 994-40-48
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