Susepnd ( 절전) 모드 ? USB Selective Suspend 란? The USB selective suspend feature allows the hub driver to suspend an individual port without affecting the operation of the other ports on the hub. Selective suspension of USB devices is especially useful in portable computers, since it helps conserve battery power. USB Device 는 초기화 ( Enum) 과정에서 Host 가 Selective Suspend 지원여부를 물어보면 대답할 의무가 있다. 아래 Log 확..