Methods and systems are provided for power management in communication devices, particularly based on cable connectivity. A communication device that comprise a communication port, comprising a first connector and a signal path communicatively coupled between device components and the connector, may be operable, such as via a power management component in the communication device, to determine whether an external cable is mated to the first connector and to transition the communication device to a sleep mode if it is determined that an external cable is not mated to the first connector.