[Nut-upsuser] Salicru SPS One eventually loses connection

[S Shaikh]

Further requested information:

OS: Linux host 6.1.0-32-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.129-1 
(2025-03-06) x86_64 GNU/Linux
NUT: nut/stable,now 2.8.0-7 all
Install method: Debian repo install (apt)

Thanks

On 10/04/2025 16:44, S Shaikh wrote:
> Hi,
>
> I have a Saclicru SPS One 900VA. This is a warranty replacement for an 
> earlier SPS One 900, except the first was a model with UK plugs, and 
> this one is with IEC.
>
> The first one used to work perfectly with the existing NUT 
> configuration. With the new unit, although NUT starts and works for a 
> while, eventually it stops working with a "stale data" message. I have 
> checked the FAQ and I can't quite figure out if the section on stale 
> data applies.
>
> I isolated the driver to get cleaner debug messages, and have provided 
> them below. Once the stale message occurs, the only way to fix things 
> is by rebooting the host running NUT (and connected to the UPS via USB).
>
> Unfortunately I haven't yet been able to see the output at the time 
> the data becomes stale (terminal buffer not big enough). I can try 
> piping it to a file.
>
> The output using -DD:
>
> https://pastebin.com/y5ZNXZ55
>
> I think this points to a change in the software in the UPS, but is 
> there a way to work around this?
>
> Many thanks