[Nut-upsuser] Salicru SPS One eventually loses connection

[S Shaikh]

On 10/04/2025 18:57, Greg Troxel via Nut-upsuser wrote:
> S Shaikh via Nut-upsuser <nut-upsuser at alioth-lists.debian.net> writes:
>
>> 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.
> My guess is that there is a USB-level disconnect and this is a problem
> between your UPS and your computer more than a nut problem.
>
> I would try a different port and a different cable.  I would look at
> kernel dmesg.  If you see disconnect there, I would leave it without nut
> running and see if it disconnects.
>
> In situations where you think you have to reboot, you might also try
> unplugging UBS cable, waiting 10s, and replugging.

Here's the output when the driver stops responding:

50850.701985    [D1] Communications with the UPS lost: status read failed!

Given I'm using the same host and cable and have only switched the UPS 
my feeling is that something has changed on the UPS side (maybe it goes 
to sleep?). However I will try a new cable and port.