On Fri, 14 Sep 2012, Harris, Jeff wrote: > I am seeing an error enumerating a USB device when discovering a > Sierra Wireless MC5728 wireless modem. I get a "unable to enumerate > USB device on port 1" message on the first attempt at discovery. > However, there is always an immediate second attempt that succeeds. > The modem appears to function correctly. As long as it's working you shouldn't worry about that message. > I am using 2.6.33.1 with an ISP1520 hub on our embedded product. If > I use the same modem on a different product that connects directly to > the USB controller in a Freescale 8314 processor, I sometimes get the > same behavior though much less frequently. I do not get the errors > at all if I use an older MC5727 modem. > > When the failure occurs, the hub_port_wait_reset function is > returning ENOTCONN after checking (portchange & > USB_PORT_STAT_C_CONNECTION). > > Is there anything to be done other than to try and nice-down the > message or contact the manufacturer? I have usbmon traces for both > modems if they would be helpful. You don't need to do anything. It's not broken, so it doesn't have to be fixed. 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
