I have repeated the experiment with the card reader attached. Resetting the USB HID devices did not have any effect. When resetting the card reader, my USB reset program hung (not killable even with kill -9) in the call to usb_reset and the same oops appeared in dmesg. Subsequently running lsusb resulted in a similar hang in lsusb. Attempting to run my USB reset program again resulted in a hang in usb_find_devices. Alex -- 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