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i have the same problem. it seems like the video drivers from nvidia (beta
for vista) doesn't even support my nvidia video card. mx 4000

"Chris Hill" wrote:

> Using Beta 2 x64.
>
> My machine has two PCIe video cards -- one is an ATI 1800XL and the
> other is a NVIDIA 7800GTX. I am only able to use one of the video
> cards at a time (the one that works is the one which I select as the
> primary VGA device in BIOS).
>
> When I start Windows, there is a popup window near the system tray
> indicating that a display device has been disabled because it is
> incompatible with the primary VGA display. In the Device Manager
> there is a message indicating that the device is disabled because a
> problem was reported (Code 43). So the driver is correctly detected
> for each device, but it doesn't work for the secondary. I tried with
> the stock drivers as well as drivers downloaded from ATI and NVIDIA.
>
> The problem is symmetric (acts the same when the video cards roles as
> primary/secondary are reversed in BIOS) so I'm guessing it is a
> Windows Vista limitation and not a driver problem. This works fine on
> Windows XP 64. In Vista, two monitors connected to the SAME video
> card work fine.
>
> Is this a known issue? Are multiple video cards supported? Are
> multiple video cards from different manufacturers supported?
>
> Thanks,
>
> Chris
>