Microsoft KB Archive/328902

= BUG: The 1394 host controller properties dialog box incorrectly shows the Power Management tab =

Article ID: 328902

Article Last Modified on 1/6/2004

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APPLIES TO


 * Microsoft Windows XP Professional

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This article was previously published under Q328902



SYMPTOMS
The 1394 host controller properties dialog box incorrectly shows the Power Management tab. Although the &quot;Allow this device to bring the computer out of standby&quot; check box is not intended to be visible to end-users, you can set this option.

If you click to select the &quot;Allow this device to bring the computer out of standby&quot; check box, you may put the system in an unreliable state if a 1394 power setting capable node tries to bring the computer off standby.



CAUSE
This issue occurs because the &quot;Allow this device to bring the computer out of standby&quot; check box on the 1394 host controller Power Management tab was incorrectly made visible to users.

Under Microsoft Windows XP Professional, 1394 wait/wake capability is not fully supported by the 1394 host controller drivers, Ohci1394.sys and 1394bus.sys.



RESOLUTION
To prevent the system from being in an unreliable state, clear the &quot;Allow this device to bring the computer out of standby&quot; check box on the 1394 host controller Power Management tab. When this check box is clear, the 1394 host controller ignores any request by a 1394 power setting capable node to bring the system off standby.



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

Additional query words: power host 1394 standby xp

Keywords: kbbug kbddk kbpending KB328902

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