On Tue, 20 Jan 2009, Wim de Vries wrote: > >> [ 351.576075] usb 2-2: new full speed USB device using uhci_hcd and > >> address 41 > >> [ 351.729542] usb 2-2: unable to read config index 0 descriptor/all > >> [ 351.729542] usb 2-2: can't read configurations, error -71 > >> [ 351.784099] hub 2-0:1.0: unable to enumerate USB device on port 2 > >> [ 352.816067] usb 2-2: new full speed USB device using uhci_hcd and > >> address 43 > >> [ 352.872105] hub 2-0:1.0: unable to enumerate USB device on port 2 > >> [ 354.056173] usb 2-2: new full speed USB device using uhci_hcd and > >> address 44 > >> [ 354.198756] usb 2-2: device descriptor read/all, error -71 > >> [ 354.256102] hub 2-0:1.0: unable to enumerate USB device on port 2 > >> > > ... > > > Thanks for the reply. > > This is a hardware problem, not a software issue. > Why? -71 is a low-level hardware error. It means that the USB packets weren't received correctly. > > You've got a bad USB > > connection. > > > That was clear to me, but why? How should I know? Insufficient power, bad cable, bad terminations, bad capacitance, electromagnetic noise... All of these things have caused problems in the past. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
