[Nut-upsuser] Is USBD necessary for average users?

Charles Lepple clepple at gmail.com
Fri Oct 4 12:18:12 UTC 2013

On Oct 1, 2013, at 11:58 PM, David N Melik wrote:

> I followed the NUT instructions that are on the projects site, I think,

^ The official NUT site? Feel free to post the URL.

> and they said to set up USBD, so I did. Is that necessary for average
> users using one PC (rather than servers), or will something not work
> right if I reread and turn off USBD?

I think Alexander explained upsd well, but here's some additional history and explanation.

Question 10, Answer 2 of the FAQ <http://www.networkupstools.org/docs/FAQ.html> points out that it is possible to customize the NUT code, and combine upsmon and upsd into a single daemon that talks to a driver. The disadvantage is that you wouldn't be able to connect more than one client at a time, so debugging the driver with upsc would no longer be possible.

Arnaud also experimented with writing a freedesktop.org HAL version of the usbhid-ups driver. This was more suited to a single PC, and worked much like the laptop battery power monitors, but HAL is deprecated now. We could certainly use more help in this area - I think a lot of the people who have contributed to NUT over the years have needed more of the "data center" functionality.

What are you trying to optimize?

Charles Lepple
clepple at gmail

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