Windows 7 Enterprise: Multiple Display Issue

[idata]

Have Dell Dimension 5150 with 82945G integrated graphics and a seperate PCI video adapter (old matrox adapter) running Windows 7 Enterprise 64. The current hardware cofiguration had no issues when Windows XP SP3 was installed. Unable to use multiple monitors after clean install of Windows 7 Enterprise 64. The monitor attached to 82945g does not show image nor is detected by system. The monitor displays no signal message if it is disconnected from 82495g. An issue is indicated in the device manager if I assign Standard VGA driver to 82945g. Monitor attached to 82945g will display image if secondary adapter is removed. Also, IGFXTRAY.exe will not run if secondary adapter is installed.

[Edward_Z_Intel]

Windows Vista and Windows Server 2008 require that when multiple graphics adapters are used in a computer, they must be of the same display driver model type: either Windows Display Driver Model (WDDM), or Windows XP Display Driver Model (XPDM). If multiple WDDM graphics adapters are present, then they must all use the same WDDM driver. If the either requirement is not met, then Windows uses the adapter that was used to start the computer, and disables any others.

For more information, please see http://technet.microsoft.com/en-us/library/cc756392(WS.10).aspx. It applies to Windows Vista and Windows Server 2008, but I guess it's same with Windows 7 as Windows 7 also uses WDDM.

[idata]

The system doesn't report Event ID 4103 as describe in the Technet link. However, as indicated before I configured the 82945g to use the same Standard VGA Graphics Adapter and was not able to resolve the issue.

[Edward_Z_Intel]

Again dual display on different graphics chip is only supported on XPDM, which means you'll need to install XPDM driver for your BOTH graphics controller. For 82945G, you may try the Windows XP driver here: http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=15618&ProdId=2102&lang=eng. I havent' tested it myself, but the idea is to install XPDM driver. Some more resources below:

http://technet.microsoft.com/en-us/library/cc756338%28WS.10%29.aspx

http://www.microsoft.com/whdc/device/display/multimonVista.mspx