Microsoft KB Archive/329844

= Screen Resolution Incorrect When External Display Device Is Attached =

Article ID: 329844

Article Last Modified on 2/28/2007

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APPLIES TO


 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q329844



SYMPTOMS
When a lower-resolution display (such as television or older monitor) is attached to a system with the following configuration, the screen resolution in the Display Properties applet may be incorrect:


 * The computer runs Windows 2000.
 * A multi-headed display adapter is installed.
 * The clone-view or dual-view feature is turned on so that the secondary monitor is an exact duplicate of the primary monitor.

For example, if you attach a television with a maximum resolution of 1024 x 768 to a notebook with a maximum resolution of 1600 x 1200, after you turn on the dual-view feature, the screen resolution slider bar may only go from 640 x 480 to 1024 x 768, and nothing higher than this is available.



CAUSE
This behavior occurs because Windows 2000 does not support clone-view or dual-view capability if you use a multi-headed video card. The video card manufacturer may support the dual-view feature in the driver.



STATUS
This behavior is by design. Windows 2000 does not support the dual-view or clone-view feature, but programmers can develop drivers that support this option.



MORE INFORMATION
This limitation applies to all video adapter manufacturers. Manufacturers can build support into their drivers for Windows 2000.

Keywords: kbprb KB329844

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