Patent ID: 8615671

Claim:
An apparatus, comprising: a memory unit to store a device connection manager for a controller of a bi-directional serial link connected to a device; detection control logic to connect to the bi-directional serial link, the detection control logic operative to determine whether the device is disconnected from the bi-directional serial link, and store information indicating a device disconnect state in a first register of the controller; and a processor operative to execute the device connection manager, the device connection manager operative to read a second register of the controller storing information indicating an interface of the controller for the bi-directional serial link is operating in a lower power management state, send a control directive on a periodic basis for the interface to transition to a temporary active state, and receive an interrupt from the interface indicating the device is disconnected from the bi-directional serial link during a given temporary active state, the given temporary active state having a time interval long enough to allow out of band (OOB) signaling to finish before returning the interface to the lower power management state.