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Intel GM45 agp support

Hi Folks,

We currently have no support for Intel GM45 chipset family. Machines
with integrated graphics chipset of this family are thus unable to run
X. The following patch rework Intel AGP detection and add support for
this chip series. It has been inspired by both FreeBSD and OpenBSD
patches. It makes X (from pkgsrc) work mostly fine.

The only trouble with this patch is that I am unable to go back to
console :-( Killing X or switching VT results in a "crazy" display,
like a sync trouble. All the text is condensed in the top of the
screen. Typing blindly works, X can be restarted and will work great.
I think I am missing a few bits (or something is broken in the Intel X

Is there any AGP guru who could help me fixing the code ?

Thanks in advance,

 - Arnaud

Attachment: intel-agp-gm45.diff
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