[Nut-upsuser] MGE Pulsar evolution 2200

[Arnaud Quette]

2012/3/20 Sabine GOUDARD <sabine.goudard at st-etienne.archi.fr>:
> Hello,

Bonjour Sabine,

> I forgot nut since more than a year because a lot of job with other
> application
>
> My server nut failed since severals months
>
> We had 3 electric failure so I must install a new server nut
>
> I work with ubuntu 10.04.4 (64bits) / I installed nut 2.4.3 with deposits
>
> I have a MGE Pulsar evolution 2200 connected on usb
>
> last week when I began my tests all was ok (communication etc etc ..)
>
> Yesterday, I tried a simulate electric failure and now, my ups is not
> recognized on usb
>
> the lsusb command doesn't find anymore my ups
> when i unplug/plug it i have these errors**
>
> onduleur kernel: [  279.070014] usb 4-1: new low speed USB device using
> uhci_hcd and address 7
> onduleur kernel: [  279.200015] usb 4-1: device descriptor read/64, error
> -71
> onduleur kernel: [  279.432511] usb 4-1: device descriptor read/64, error
> -71
> onduleur kernel: [  279.660013] usb 4-1: new low speed USB device using
> uhci_hcd and address 8
> onduleur kernel: [  279.790014] usb 4-1: device descriptor read/64, error
> -71
> onduleur kernel: [  280.030013] usb 4-1: device descriptor read/64, error
> -71
> onduleur kernel: [  280.260012] usb 4-1: new low speed USB device using
> uhci_hcd and address 9
> onduleur kernel: [  280.680011] usb 4-1: device not accepting address 9,
> error -71
> onduleur kernel: [  280.800013] usb 4-1: new low speed USB device using
> uhci_hcd and address 10
> onduleur kernel: [  281.220010] usb 4-1: device not accepting address 10,
> error -71
> onduleur kernel: [  281.220325] hub 4-0:1.0: unable to enumerate USB device
> on port 1
>
> **I had this last year on my old server but i never found how to resolve
>
> When nut service start i normally have this in syslog
>
> Can't connect to UPS [OND1] (usbhid-ups-OND1): No such file or directory
>
> What can I do ?

this is a low level error, Ie at kernel level, so NUT can't do much.

the communication module of the UPS seems stuck.
the only to restore it is to power off the UPS, wait 10 seconds, then
power it back.

I would suspect some EMI issue.
is it an external USB hub?
are there other devices on the same bus than the UPS?
what is the result of "grep EMI /var/log/messages"?

cheers,
Arnaud
-- 
Linux / Unix Expert R&D - Eaton - http://powerquality.eaton.com
Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/
Debian Developer - http://www.debian.org
Free Software Developer - http://arnaud.quette.free.fr/