I have exact the same problem
my card is X800 AGP Card from Asus
what I have found by testing lots of driver is that this version works:
all other versions disables directdraw and AGP texture acceleration.
have not found any other solution to this.. and would appreaciate any fix
and workaround for the newer drivers..
> I've tried two different graphics card, bot of which to be Vista Compatible.
> One was a ATI Radeon X1950XTX AGP Card, then second is a Radeon X2600 HD AGP
> Card, the latter being a DirectX 10 Card. Both cards worked ok when using the
> standard Vista drivers, however gaming performance was terrible. Updating
> either card to the latest Vista drivers resulted in the loss of all 3d
> functionality. I ran dxdiag, under the dispaly tab I see the following:
> DirectDraw Acceleration: Not Available
> Direct3D Acceleration: Enabled
> AGP Texture Acceleration: Not Available
> This means Aero is disabled, but more importantly I can't run any games, as
> an error something like No 3D Device Available appears.
> Can anyone help me please?