Multimon with two video cards in Vista

[Chris Hill]

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

 

[Guest]

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

 

[Guest]

Actually I have the same problem with 2 'supported' cards. Don't know that 2
cards work at all in vista, only the primary from the BIOS works and the
other Code 43's out... need to go find a single card that will drive 3
monitors I guess

 

[Guest]

i got it working this way:

ati pci dual head 9250 which didn't disable the onboard video of my system
and both came up without the dreaded code 43 but it's the only dual head
video card i have been able to do this with (pci or agp) i cannot get any agp
cards to work alongside pci cards in vista rc1. when i install an agp card it
automatically disables the onboard video on my intel board. so that doesn't
work (9600 with pci 9250 both dual head).

 

[Guest]

i got it working this way:

ati pci dual head 9250 which didn't disable the onboard video of my system
and both came up without the dreaded code 43 but it's the only dual head
video card i have been able to do this with (pci or agp) i cannot get any agp
cards to work alongside pci cards in vista rc1. when i install an agp card it
automatically disables the onboard video on my intel board. so that doesn't
work (9600 with pci 9250 both dual head).