Microsoft KB Archive/945086

= When you watch Live TV in Windows Media Center on a Windows Vista-based computer, a green screen is displayed after you change the channel to view an HDTV program =

Article ID: 945086

Article Last Modified on 11/19/2007

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APPLIES TO


 * Windows Vista Home Premium
 * Windows Vista Ultimate
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition

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SYMPTOMS
Consider the following scenario:
 * You are watching Live TV in Windows Media Center on a Windows Vista-based computer.
 * You change the channel to a program that is being broadcast in a high-definition television (HDTV) format.

In this scenario, a green screen is displayed instead of the expected Live TV program.



CAUSE
This problem occurs if the following conditions are true:
 * You have an Advanced Television Systems Committee (ATSC)-compliant tuner installed to receive over-the-air digital broadcasts from your local TV stations.
 * You are using a video card driver on which the hardware vendor has disabled DirectX Video Acceleration (DXVA) for HDTV. However, DXVA is still enabled for standard-definition television (SDTV).
 * You change the channel from a program that is being broadcast as SDTV to a program that is being broadcast as HDTV.



WORKAROUND
To work around this issue, use one of the following methods:
 * Try to resize the Windows Media Center window from full-screen to windowed and then back to full-screen.
 * Exit and then restart Windows Media Center.
 * Contact your graphics card vendor for an updated driver that may work around this issue in Windows Media Center.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbtshoot kbexpertisebeginner kbwinvistapostrtmfix KB945086

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