I have an APC Back-UPS CS 500 which connects via USB. I am running NUT 2.4.1 under Karmic amd64. The entry in ups.conf is
[apc] driver = usbhid-ups port = auto desc = "APC Back-UPS CS 500" I left upsd.conf at the default values, nut.conf is "mode standalone", and in upsmon.conf, the monitor line is MONITOR a...@localhost 1 ups_local mypassword master and in upsd.users, [ups_local] password = mypassword upsmon master I start nut with sudo /etc/init.d/nut start; sudo upsdrvctl start I am able to connect to the UPS, and the command "upsc apc" returns the UPS characteristics, so the connection definitely works. However, after a short period of time, the UPS connection is lost and then regained, so I get a sequence of messages like this (from syslog): Any suggestions for debugging this? Feb 12 14:10:38 fin8344 upsmon[2336]: Communications with UPS a...@localhost established Feb 12 14:11:48 fin8344 upsd[2331]: Data for UPS [apc] is stale - check driver Feb 12 14:11:50 fin8344 upsd[2331]: UPS [apc] data is no longer stale Feb 12 14:12:58 fin8344 upsd[2331]: Data for UPS [apc] is stale - check driver Feb 12 14:13:00 fin8344 upsd[2331]: UPS [apc] data is no longer stale Feb 12 14:16:56 fin8344 upsd[2331]: Data for UPS [apc] is stale - check driver Feb 12 14:16:58 fin8344 upsmon[2336]: Poll UPS [...@localhost] failed - Data stale Feb 12 14:16:58 fin8344 upsmon[2336]: Communications with UPS a...@localhost lost Feb 12 14:17:02 fin8344 upsd[2331]: UPS [apc] data is no longer stale Feb 12 14:17:03 fin8344 upsmon[2336]: Communications with UPS a...@localhost established And then I sometimes get message like this relating to the driver: Feb 13 13:59:18 fin8344 upsmon[15163]: Communications with UPS a...@localhost lost Feb 13 13:59:18 fin8344 usbhid-ups[15176]: Got disconnected by another driver: Device or resource busy Feb 13 13:59:18 fin8344 kernel: [85629.405233] usb 2-1.5: usbfs: process 15176 (usbhid-ups) did not claim interface 0 before use I have no idea where to begin looking for a configuration problem. Can anyone offer suggestions? Thanks! Bob _______________________________________________ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser