Re: Problem with UPS APC Back-UPS CS 650

On Monday 30 July 2007, Boris Losev wrote:
> I've got the APC Back-UPS CS 650 and Debian Etch with the kernel 
> 2.6.18-4-686. I've tried to connect my UPS to PC via USB cable and got 
> the errors:
> 
> usb 2-1: new low speed USB device using ohci_hcd and address 14
> usb 2-1: device not accepting address 14, error -71
> usb 2-1: new low speed USB device using ohci_hcd and address 15
> usb 2-1: device not accepting address 15, error -71
> usb 2-1: new low speed USB device using ohci_hcd and address 16
> usb 2-1: device descriptor read/64, error -71
> usb 2-1: device descriptor read/64, error -71
> usb 2-1: new low speed USB device using ohci_hcd and address 17
> usb 2-1: device descriptor read/64, error -71
> usb 2-1: device not accepting address 17, error -71

I saw those errors once with a UPS from MGE.  The problem was that
the UPS needed to see a USB power cycle ... at least, the workaround
of connecting it to a root hub port which supported power cycling
ensured that this problem went away.

- Dave


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