I have had a similar problem to many other people for the last few months with my Cyberpower UPS. It was working properly after reboot about one in five times; the rest of the time it would endlessly disconnect and reconnect, according to syslog messages.
The latest I was able to find towards a solution is http://www.mail-archive.com/[email protected]/msg06671.html The root cause is identified as a Cyberpower firmware behavior, that disconnects the box, unless a driver claims it within 20 seconds of connection. Since the driver is started by an rc script only at boot, if that boot script does not run at the right time, the only recovery is to run 'upsdrvctl start' manually - which is what I had been doing. The suggestion in the above article is to re-arrange the boot scripts to have nut start earlier. In my case this was a bit harder to control (Ubuntu uses upstart) and did not seem very robust; I came up with an alternative solution for systems that use udev. The solution is to have udev run 'upsdrvctl start' when this device connects. To do so, add ", RUN+="/sbin/upsdrvctl start" to the end of the udev config line for your device. Mine looks like this: # Dynex DX-800U?, aloso 825AVRLCD - usbhid-ups ATTR{idVendor}=="0764", ATTR{idProduct}=="0501", MODE="664", GROUP="nut", RUN+="/sbin/upsdrvctl start" In Ubuntu, the recommended way to do this is described in /etc/udev/rules.d/README. I copied /lib/udev/rules.d/*-nut-usbups.rules to /etc/udev/rules.d/nut-usbups.rules and modified my device's line as shown above. Works like a charm, very stable, and, as a fringe benefit, I can hotplug my UPS, if I need to rearrange my USB cables. HTH, ---SirG _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
