> 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?
On Thu, Nov 10, 2011 at 9:50 AM, Laszlo Hazy <[email protected]> wrote: > Thanks for the reply. > I did lsusb as root. The system logs are void of any reference to the UPS > being connected/disconnected. Sounds like a hardware problem. > 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. The microcontrollers in UPSes are generally very cheap. Have you tried a 1.5 Mbit/sec USB device, such as a mouse or keyboard? They use a different set of pull-up resistors than 12 Mb/s or 480 Mb/s devices, and if there is a problem with the USB jack on the motherboard, it might only manifest itself at one speed. -- - Charles Lepple _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
