Hi , If a usb host and device are physically connected over usb bus , but a device disconnect is reported in the system , how to check whether usb host has disconnected the device electronically or device has disconnected itself electronically from the usb bus , though physically both host and device are still connected . Regards Amit Nagal -- 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