i believe that this works for vga attached monitors, vesa says that when the clocks
disappear on the sync the monitor should shutdown.
the raspberry pi uses hdmi and also it doesn't use a vesa bios, it has a gpu bios
which does a similar job but is not standardised, and, though it is documented,
it can be tough to use (for me at least).
i am happy to be contradicted on any of this of couse.
-Steve
This might be wildly off the mark, but is there something VESA related to do this, VGA monitors, et al?
I prepare to stand flamed. ^.^