Tianyu: Did you ever test the port power-off mechanism with system suspend? Right now it doesn't seem like it would work, because it relies on runtime PM to turn off the port power, and runtime PM doesn't operate normally during a system suspend. 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