Thanks for the reply.
I did lsusb as root. The system logs are void of any reference to the UPS being 
connected/disconnected. I changed the USB cable, replaced the batteries, it all 
did not matter. I have difficulty believing that the USBhardware or software 
stack in the UPS is broken, that just doesn't usually happen.




>________________________________
>From: Charles Lepple <[email protected]>
>To: Laszlo Hazy <[email protected]>
>Cc: "[email protected]" <[email protected]>
>Sent: Monday, November 7, 2011 10:21:40 PM
>Subject: Re: [Nut-upsuser] Belkin F6C550-AVR
>
>On Nov 7, 2011, at 9:39 PM, Laszlo Hazy wrote:
>
>> The interesting thing is that lsusb does not show the UPS, which is weird to 
>> me. And yes, the cable is plugged in and the USB port on the PC does work 
>> (tried with a mass-storage device).
>
>This is key. If the kernel doesn't recognize the UPS as a valid USB device, 
>neither will NUT.
>
>Have you tried running lsusb as root?
>
>Do you get any messages in dmesg when you plug in the UPS?
>
>
>
>
>
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