Well I'll be dipped! Suddenly it's working. After writing about my woes I thought I'd try it one more time, and at least generate that "failure to register" error. When I unplugged the USB cable and plugged it in again, I got this: usb 2-1: USB disconnect, address 3 usb 2-1: new low speed USB device using ohci_hcd and address 4 hiddev96: USB HID v1.10 Device [APC Back-UPS ES 350 FW:800.e5.D USB FW:e5] on usb-0000:00:0b.0-1 *** There used to be an error message appearing right here, but this time none. *** So then I ran the test program, which said I might still have a problem, but I went ahead anyway and ran the monitoring daemon, which ran without complaint. Next, I ran the "access" program to display the status of my UPS, and here is my proud outcome: APC : 001,033,0813 DATE : Thu Jun 23 20:15:27 EDT 2005 HOSTNAME : hhs48 RELEASE : 3.10.17 VERSION : 3.10.17 (18 March 2005) debian UPSNAME : hhs48 CABLE : USB Cable MODEL : Back-UPS ES 350 UPSMODE : Stand Alone STARTTIME: Thu Jun 23 19:58:30 EDT 2005 STATUS : ONLINE LINEV : 118.0 Volts LOADPCT : 9.0 Percent Load Capacity BCHARGE : 100.0 Percent TIMELEFT : 42.1 Minutes MBATTCHG : 5 Percent MINTIMEL : 3 Minutes MAXTIME : 0 Seconds LOTRANS : 088.0 Volts HITRANS : 138.0 Volts ALARMDEL : Always BATTV : 13.5 Volts NUMXFERS : 0 TONBATT : 0 seconds CUMONBATT: 0 seconds XOFFBATT : N/A STATFLAG : 0x02000008 Status Flag MANDATE : 2005-04-17 SERIALNO : AB0516149651 BATTDATE : 2000-00-00 NOMBATTV : 12.0 FIRMWARE : 00.e5.D USB FW:e5 APCMODEL : Back-UPS ES 350 END APC : Thu Jun 23 20:15:53 EDT 2005 *** Theoretically I know what all that stuff means. That is, I know where to look it up! <smile> *** Now for my obsessive self flagellation: I don't know why the damn thing did not work before, and I don['t know why it is working now. But this is looking pretty good to me right now. A prolonged power outage will shut my system down gracefully, and will also turn off the UPS itself. I will have to do some more configuring to get it to restart unattended when power is restored, but the book says I can do that if I want to. Pretty soon this computer will not need me at all, for anything, and I will be FREE! Chuck The Moon is Waning Gibbous (95% of Full) But you can still get downloads from http://www.mhcable.com/~chuckh