Cannot Hide Unsupported Modes for Monitor If DualView is Turned On (327727)

The information in this article applies to:

Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

This article was previously published under Q327727

SYMPTOMS

If the DualView feature is turned on for an external CRT monitor, the Hide modes that this monitor cannot display option may appear dimmed (and is therefore unavailable) for the external monitor.

The problem has been observed only on portable computers that use an ATI video card and driver.

CAUSE

After you extend the desktop, Windows XP may not call the DrvGetModes function to obtain the modes that the ATI driver can display for the external monitor. Therefore, the Hide modes that this monitor cannot display option for the external monitor is not available.

WORKAROUND

To work around this issue, close the Display Properties window, and then reopen it. The Hide modes that this monitor cannot display option should now be available (no longer appears dimmed).

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

MORE INFORMATION

You can use the DualView feature in Windows XP to extend the desktop to multiple monitors.

For additional information about DualView, click the article numbers below to view the articles in the Microsoft Knowledge Base:

283674 Description of DualView in Windows XP

307873 HOW TO: Configure and Use Multiple Monitors in Windows XP

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Modification Type:	Minor	Last Reviewed:	1/15/2006
Keywords:	kbdisplay kbprb KB327727