Peter Gutmann has posted a lengthy
at the costs of the DRM features built into Windows Vista.
Reading it is a sort of Alice-in-Wonderland experience, highly recommended.
"If a graphics chip is integrated directly into the motherboard and
there's no easy access to the device bus then the need for bus encryption
is removed. Because the encryption requirement is so onerous, it's quite
possible that this means of providing graphics capabilities will suddenly
become more popular after the release of Vista. However, this leads to a
problem: It's no longer possible to tell if a graphics chip is situated on
a plug-in card or attached to the motherboard, since as far as the system
is concerned they're both just devices sitting on the AGP/PCIe bus. The
solution to this problem is to make the two deliberately incompatible, so
that HFS can detect a chip on a plug-in card vs. one on the
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