Comment 9 for bug 578200

guys,

this seems related to a udev issue.
things to try:
- stop nut (sudo service nut stop ; killall -9 megatec_usb)
- start the driver and server as root (sudo /lib/nut/megatec_usb -u root -a belkin-ups && sudo upsd -u root)
- then check using upsc

you should also try the blazer_usb driver, as it has since replaced megatec_usb.
finally, using packages from natty or maverick may be an option