Hi SirG(ent?) 2012/10/6 SirG <[email protected]>
> 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. > thanks for sharing this solution with the list. Side questions: - have you (and others) reported this issue to CyberPower, and asked for a fix. - do you know (at least approx.) which firmware/models are impacted. Side comment: your solution has some limitations. Mainly, whenever or (SW or HW) disconnection will happen, another instance of usbhid-ups will be started. So you may either create a wrapper script or use the following line: /sbin/upsdrvctl stop ; /sbin/upsdrvctl start or /usr/bin/killall -9 usbhid-ups ; /sbin/upsdrvctl start cheers Arnaud -- Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org Debian Developer - http://www.debian.org Free Software Developer - http://arnaud.quette.fr
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