Auto-switching interfaces to device subsystems

A method auto-switches interfaces between a client computer and subsystems in a device under management. A first output bus from a first subsystem is coupled to a client computer via a multiplexer, wherein the first subsystem is a subsystem from multiple system subsystems in the device under management. A hardware subsystem bus monitor monitors all output busses from the multiple system subsystems for a predetermined event on a bus. In response to the predetermined event being detected on a second output bus from a second subsystem in the device under management, the multiplexor decouples the first output bus from the client computer and couples the second output bus to the client computer.