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Using the DirectX Diagnostic Tool, you can test multimedia driver compatibility and display driver status and version information. If necessary, you can use the tool to disable or reduce hardware acceleration levels to diagnose problems. You can also use the tool to collect information that might be useful during a technical support call. To start the DirectX Diagnostic Tool

The DirectX Diagnostic Tool dialog box reports information on separate tabs about the various components and drivers. Table C-7 describes each tab in the DirectX Diagnostic Tool dialog box.

9

Description Provides system information about your computer, and specifies the version of DirectX that is installed on your computer. Lists the file name, version number, date, and size for each DirectX file that is installed on your computer. Lists current display settings, and allows you to disable hardware acceleration and test DirectDraw and Direct3D compatibility. Displays current sound settings, and tests audio hardware DirectSound compatibility.

Part VI:

Description Lists music port information, such as Musical Instrument Digital Interface (MIDI) settings, and allows you to test the DirectMusic component of DirectX. Lists the input devices and drivers installed on your computer. Lists the registered DirectPlay service providers that are installed on your computer, and allows you to test DirectPlay components. Offers additional options if you cannot resolve your DirectX issue by using previous tabs. You can start the System Configuration tool (Msconfig.exe) or override DirectDraw video refresh display settings from this tab. For more information about the System Configuration tool, see System Configuration Utility later in this appendix.

Figure 9-14.

You can use the DirectX Diagnostic Tool to determine whether the following issues apply to your system. Incorrect or outdated DirectX components In the Notes section on the DirectX Files, Display, Sound, Music, Input, and Network tabs, look for warnings or files labeled as Beta, Debug, Outdated, or Unsigned drivers. For best performance, install the most recent versions of DirectX and use Microsoft-signed drivers. For more information about obtaining and installing the latest version of DirectX, see the DirectX link on the Web Resources page at http://www.microsoft.com/windows/reskits/webresources. Unsigned or beta drivers Check the DirectX Files tab for drivers labeled Unsigned or Beta. Unsigned and beta drivers have not been fully tested by Microsoft Corporation for compatibility with the latest version of DirectX. No video hardware acceleration Some graphics-intensive programs run slowly or not at all if DirectDraw or Direct3D hardware acceleration is unavailable or disabled. Hardware acceleration offloads a substantial portion of 2D image and 3D geometry processing from the central processing unit (CPU) to the video adapter, resulting in much faster system performance. If you experience poor video performance, use the DirectX Diagnostic Tool to verify acceleration settings. To check video hardware acceleration settings 1. Start the DirectX Diagnostic Tool. 2. Select the Display tab, and then in DirectX features verify that at least DirectDraw Acceleration and Direct3D Acceleration are marked as Enabled. If the option to enable acceleration is not available, your video adapter might not support DirectX acceleration in hardware or you might need to install updated drivers.

Appendix C:

Features such as AGP or Direct3D acceleration might not be available with older video hardware. You might need to upgrade your video hardware to use certain features in newer technologies.