USB Selective Suspend

Question

When the following keys appear under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB

Name                                                       Type                                     Data

DeviceSelectiveSuspended                      REG_DWORD                       0x00000001 (1)

SelectiveSuspendEnabled                        REG_DWORD                       0x00000001 (1)

Is one key dependent upon the other?  Can they both have a data value of 1? I am having issues with USB devices not entering selective sleep.  None of the registry keys had the SelectiveSuspendEnabled key so I added it with a data value of 1.  Does the DeviceSelectiveSuspended need a data value of 0?  I have gone through power management and made sure that the USB selective suspend setting is enabled and it was.  This did not make a difference.  My USB devices did not enter selective suspend.  What keys need to be present for USB sleep to work?

Answer 1

Hello Joseph,

Thank you for visiting Microsoft Community Forum.

As per the issue description, I understand that USB device does not enter into selective suspend. You have already tried a number of troubleshooting steps and made registry changes but that did not help.

I would suggest you to refer the following Microsoft articles for help on this issue.

USB selective suspend feature is disabled in Windows

http://support.microsoft.com/kb/2934123

USB Selective Suspend

http://msdn.microsoft.com/en-us/library/ff540144(v=vs.85).aspx

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base***How to back up and restore the registry in Windows***

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