Bruce Pleat via Nut-upsuser <[email protected]>
writes:

> I tried swapping cables, changing the USB port on the test computer, and
> more.
>
> I'd rather not waste perfectly good UPS, and I'd rather not go live with
> this unreliability.
>
> Thoughts on how I can diagnose this further?

If lsusb is flaky, it's probably not nut.

I would try to understand the flakyness by

  - plug in one UPS and see how it is. It sounds like you have multiple
    at once
  - use a different computer, and maybe different OS
  - using a powered hub with just the UPS on it

I think your tests are on the right track.

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