David Brownell: > 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 > > I'm sorry I'm not an expert in theUSB terminology :). What is a "root hub port which supported power cycling" ? Could you advice me any hardware for it ?
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