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From: nan_hsing Chang on 21 Oct 2009 02:51
I wrote the WDDM for our display adapter, but our adapter does not
have 3D HW acceleration. Thereby, my user mode driver report unsupport
all Dx9 caps and the DWM(Desktop windows manager) can't run in Server
2008 R2 system.

I plug our display adapter and NVIDIA card into Windows Server 2008
R2, the system run in the dual view, but the DWM still cannot run.
When the system only plug NVIDIA card, the DWM can run with aero
effect. My question is as follows.

1. In hybird display adapter system, is it possible that one run DWM
and another does not run DWM?
2. Could my WDDM driver get windows 2008 R2 logo without 3D HW, that
only have display and VGA function?
From: Ivan Brugiolo [MSFT] on 21 Oct 2009 07:25
1)
Short answer: NO
Long answer:
In theory, if the display-set has VidPn-Exclusive-Ownership outputs for your
card
and VidPn-Shared-Ownership outputs for the remaining ones, then yes.
In other words: if you have a full-screen DXGI/D3D[10|11] application
on the monitor that is being driven by your card, then the deskop compositor
would not consider that as elegible for composition (because it is not
own-able),
but it would start on the other monitors.
In theory, you could write a DDraw (pure 2D) runtime that behaves like a
D3D10 runtime with regard of VidPn Ownership [this problem is also
referred to as Runtime-mamanged-Primaries vs Application-managed-primaries],
but, that runtime does not exist for D3D < 9l, and, there are no plan to
make one.

In general, having desktop composition active on multiple heterogeneour
adapters is fully supported in Win7/WS08-R2 and routinely tested.
The requirements for desktop composition are unchanged from Vista:
D3D9L capable card with pixled-shader 2.0 support, and video-ram
and video-ram-bandwidth adequate to driver your screen size.

2)
I'm not familiar with the logo requirements.
I would start doing a search for `?q=FeatureScore+WDDM`.
That should bring you to a document that describes high level the
requirements.


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"nan_hsing Chang" <nhchang03(a)gmail.com> wrote in message
news:b6d863da-4dfa-4760-bedd-19cad11103e0(a)12g2000pri.googlegroups.com...
>I wrote the WDDM for our display adapter, but our adapter does not
> have 3D HW acceleration. Thereby, my user mode driver report unsupport
> all Dx9 caps and the DWM(Desktop windows manager) can't run in Server
> 2008 R2 system.
>
> I plug our display adapter and NVIDIA card into Windows Server 2008
> R2, the system run in the dual view, but the DWM still cannot run.
> When the system only plug NVIDIA card, the DWM can run with aero
> effect. My question is as follows.
>
> 1. In hybird display adapter system, is it possible that one run DWM
> and another does not run DWM?
> 2. Could my WDDM driver get windows 2008 R2 logo without 3D HW, that
> only have display and VGA function?

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