Formerly just a simple control for the car stereo, the head unit has evolved into a universal command center providing a unified user interface for entertainment, climate control, communication, navigation and more. However, there is one component in a modern car that seems to be predestined for Linux: the head unit. These will not benefit from features such as memory management, multitasking, multi-core and multi-cpu support and more that the Linux kernel offers. Examples are engine management, airbag control, anti-lock brakes, automatic gearbox etc. Many of these modules perform a small range of very specific tasks in a constraint environment for which a rather heavyweight general purpose operating system such as Linux is not a good fit. But where does Linux fit into this picture? The list of features seems to be endless.
Anti-lock brakes and airbags electronic climate control central locking and unlocking systems satellite navigation in-vehicle infotainment systems. Today there can be over 100 electronic control modules (ECU) in a car performing a myriad of functions to assist the driver and provide comfort and convenience to the passengers.
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