Kristian Evensen <kristian.evensen@xxxxxxxxx> writes: > We are currently facing a USB problem that we have not been able to > solve. A USB ACK is not sent and the following messages appear in the > kernel logs: > Thu Nov 21 09:44:53 2013 kern.err kernel: [ 490.600000] qmi_wwan > 1-1.1.2:1.4: nonzero urb status received: -71 > Thu Nov 21 09:44:53 2013 kern.err kernel: [ 490.600000] qmi_wwan > 1-1.1.2:1.4: wdm_int_callback - 0 bytes The most likely cause of this is a modem firmware crash. I don't think there is much you can do about that, except trying to avoid the situations which causes the crash or getting another modem. Bjørn -- 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
