[Nut-upsuser] Nut problems with Centos and Belkin UPS

Arjen de Korte nut+users at de-korte.org
Mon Nov 26 08:13:37 UTC 2007

Richard Chapman wrote:

> I have changed the driver in my  ups.conf to usbhid-ups, and based on
> other literature I have read - I set the port to "auto", but at startup
> i get the error:
> Starting UPS driver controller: Network UPS Tools: 0.28 USB communication driver 0.28 - core 0.30 (2.2.0-)
> No matching HID UPS found
> Driver failed to start (exit status=1)
> I also tried setting the port to "/dev/hiddev0" and "/sys/class/usb/hiddev0"
> based on a gnome device manager view - but these gave the same error.
> I have checked lsusb -vv - and it still reports the device as present, though at a different "device" number.
> The change in number seems strange since I don't believe I have moved the cable nor rebooted the system.
> Should the "auto" port specification work OK, and if so - can you
> suggest why it isn't being found. Alternatively - can you advise me how
> to find and specify the correct usb port.

Running the driver in debug mode might help us further here:

	<path>/usbhid-ups -u root -DDDDD -a <upsname>

> You may be able to answer another question:
> The "man belkinunv"  discusses a limitation of the belkin UNV ups not
> properly supporting soft shut-down - and also discusses a rather
> unsatisfactory (IMHO) workaround. I imagine this limitation will apply
> equally to the USB driver - though the workaround probably will not.

The only way to find this is, it to try. But in order to do that, we
first need the driver to run/

> I don't think this issue would force me to revert to the serial driver
> because i don't much like the strategy of completely flattening the
> battery to achieve a pseudo soft shut-down. Can you (or others) confirm
> that the limitation will also apply to the USB driver, and/or that the
> workaround will not be available in the USB driver?

There is no workaround in the driver, that's for sure. But I don't know
if your UPS requires this.

> Also - I am not familiar with the "version from the trunk" but I assume
> it is some "beta" development stream. If you think I would be well
> advised to look into this further - I would take your advise of course.
> Any tips of how to find this would be appreciated. So far - I have only
> worked from rpm distributions. If "the trunk" involves recompiling
> source3s - this may be a reasonable learning curve for me...:-)

It would require recompiling packages.

Best regards, Arjen

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