On 2011-10-16 12:06, Ron wrote: > > Rebooting worked for me too. Wish I had read this post earlier >
Hi Ron, I've been struggling with nut and CyberPower USB devices for over a year now. You may find connection to the UPS on boot to be unreliable, sometimes it will connect, other times it won't. >From the thread: "Re: [Nut-upsuser] USB CyberPower" ----------------------------------------------------------- Hi James, I've worked extensively on getting a similar CyberPower UPS (same IDs) to play well with nut. The conclusion I ultimately came to is that if this UPS is not connected to by it's driver within about 20sec, it drops off the USB bus and re-enumerates. This causes an endless cycle of the UPS attaching and detaching. In archlinux, I was able to make it work by placing the nut daemon at the beginning of the rc scripts, before everything else. This caused it to be attached to before it dropped from the bus. Once it was attached, everything worked. IMHO, If you can, return it and get a different unit. ----------------------------------------------------------- As the text above indicates, the time between the system powering up, and the driver trying to connect to the UPS is critical. If this time is too long (greater than about 20sec) the UPS will have already disconnected from the USB and the connection will fail. Thereafter the UPS will continuously re-enumerate, wait about 20sec then disconnect again, and continue an endless cycle of re-enumerate/wait 20sec/disconnect. One major factor in the length of the delay on power up, was my computer's DHCP delay. I found if I could get the nut driver to load prior to my computer going out for DHCP, then it would reliably connect on boot. If you have a static Network IP address, then this DHCP delay is not a factor for you. Anyway, try to connect to the UPS first, before any other boot time activity. Thanks for your post! Please pass along your ongoing experiences... johnea _______________________________________________ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser