Dell Media Direct button

["Per Öberg" <oberg@isy.liu.se>]

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Hi

Some laptops, e.g., from Dell have a special button that they use to
boot a special embedded OS for media only instead of the ordinary OS.

For my Dell XPS1330M I can determine if the Media button was pressed by
first writing 0xf9 to port 0x70 and then testing bit 0x08 of port 0x71.

It would be really nice if such a test could be enabled in grub so that
grub can go directly to a specific menu alternative without showing the
gui if the media button was pressed.

Is this interesting? I'd like to contribute but I don't know where to start.

Regards Per Öberg

-- 
Per Öberg, Ph.D. Student
Address: Division of Vehicular Systems
Department of Electrical Engineering
Linköpings universitet
581 83 Linköping, SWEDEN
Phone: +46 (0)13-28 23 69
e-mail: oberg@isy.liu.se
PGP: http://www.fs.isy.liu.se/~oberg/0x61984A9D.asc


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