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


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