[PATCH] vbe: Fix caching of DDC support status

[Keith Packard]

Adam Jackson <ajax at redhat.com> writes:

> There are multiple kinds of "not supported" here.  One of them is where
> the video BIOS doesn't support the entrypoint.  Another is where the
> BIOS returns nothing because no monitor happens to be connected.  In the
> latter case we should just pretend we haven't checked yet, otherwise
> plugging in a monitor later and retrying DDC would fail.

This all makes sense, but I'd love to know if someone else has tried
this or has a better understanding of this code before I merge it into
master.

-- 
keith.packard at intel.com
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