You enable the USB Selective Suspend feature on a computer that is running Windows 7 or Windows Server 2008 R2. Then, the computer stops responding when one or more of the following conditions are true:
The computer enters the Sleep or Hibernate state.
One or more USB devices resumes from an idle state after a period of inactivity.
Note You can restart the computer to recover from this issue.
This issue occurs when an attached USB device resumes from the USB Selective Suspend state, and the USB hub incorrectly reports that the device is disconnected from the USB hub port. This incorrect status report may be caused by a hardware error in the USB hub or in the attached USB device. Then, the Microsoft USB hub driver (Usbhub.sys) incorrectly tries to obtain a spinlock that has already been obtained in the same thread. This causes a kernel-mode deadlock. Therefore, the computer stops responding.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Prerequisites
This hotfix can be applied on computers that are running Windows 7 or Windows Server 2008 R2.
Restart requirement
You have to restart the computer after you apply this hotfix.
Registry information
To use one of the hotfixes in this package, you do not have to make any changes to the registry.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows 7 and Windows Server 2008 R2 file information notes
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are
listed separately
. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Usbccgp.sys
6.1.7600.16385
75,264
13-Jul-2009
23:51
x86
Usbhub.sys
6.1.7600.20521
258,560
05-Sep-2009
03:00
x86
Usbd.sys
6.1.7600.16385
5,888
13-Jul-2009
23:51
Not Applicable
Usbehci.sys
6.1.7600.16385
41,472
13-Jul-2009
23:51
x86
Usbhub.sys
6.1.7600.20521
258,560
05-Sep-2009
03:00
x86
Usbohci.sys
6.1.7600.16385
20,480
13-Jul-2009
23:51
x86
Usbport.sys
6.1.7600.16385
284,160
13-Jul-2009
23:51
x86
Usbuhci.sys
6.1.7600.16385
24,064
13-Jul-2009
23:51
x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File name
File version
File size
Date
Time
Platform
Usbccgp.sys
6.1.7600.16385
98,816
14-Jul-2009
00:06
x64
Usbhub.sys
6.1.7600.20521
343,040
05-Sep-2009
03:24
x64
Usbd.sys
6.1.7600.16385
7,936
14-Jul-2009
00:06
x64
Usbehci.sys
6.1.7600.16385
51,200
14-Jul-2009
00:06
x64
Usbhub.sys
6.1.7600.20521
343,040
05-Sep-2009
03:24
x64
Usbohci.sys
6.1.7600.16385
25,600
14-Jul-2009
00:06
x64
Usbport.sys
6.1.7600.16385
324,608
14-Jul-2009
00:06
x64
Usbuhci.sys
6.1.7600.16385
30,720
14-Jul-2009
00:06
x64
For all supported Itanium-based versions of Windows Server 2008 R2
After you apply this hotfix, the issue described in the "Symptoms" section will not occur. However, the following issues may occur:
An attached USB device resumes from the USB Selective Suspend state when the computer is running. Then, Windows may report that the USB device is disconnected from the computer, or that the USB device is reconnected to the computer. Additionally, the affected USB device is unresponsive for several seconds to less than one minute.
When the computer tries to enter a Sleep or Hibernate state, there is no visible indication that an attached USB device is disconnected. When the computer resumes from the Sleep or Hibernate state, Windows reports that the USB device is disconnected from and reconnected to the computer.
To work around this issue, clear the Allow the computer to turn off this device to save power check box for the affected USB device or USB Root Hub:
Click Start, type device manager in the Start Search box, and then press ENTER.
Note If you are prompted for an administrator password or confirmation, type your password and then click Continue.
On the View menu, click Devices by connection.
Expand the ACPI node, expand Microsoft ACPI-Compliant System, and then expand PCI bus.
Several USB universal host controllers will be listed.
Expand each USB universal host controller node, and then expand successive subnodes until you find the name of the USB device.
When you locate the affected device, right-click the device, and then click Properties.
If there is a Power Management tab, click the Power Management tab, and clear the Allow the computer to turn off this device to save power check box, then click OK.
If there is no Power Management tab, click Cancel, then double-click the associated USB Root Hub, click the Power Management tab, clear the Allow the computer to turn off this device to save power check box, then click OK.
Note You may have more than one attached USB device or USB hub. You can apply these steps to each USB device or USB Root Hub in turn to identify which one causes the issues. If the issue does not occur after you apply these steps to a particular device or USB Root Hub, then that device or USB Root Hub causes the issue.
For more information about USB Selective Suspend, visit the following Microsoft Developer Network (MSDN) Web site: