Symptoms

On a Windows XP-based, Windows Vista-based, or Windows Server 2008-based computer, you plug some streaming USB devices into a USB 2.0 hub, such as a streaming USB headset or a USB camera. However, these devices behave incorrectly. This problem presents different symptoms in Windows XP and Windows Vista.

Symptoms in Windows XP

The devices that you plug into the USB 2.0 hub behave incorrectly.

For example, you listen to music from a USB headset that is connected to a USB 2.0 hub. The headset has some additional functions that have interrupt pipes, or you also have a USB input device connected to the same USB hub, such as a USB mouse or a USB keyboard. After you play and stop the music several times, the USB mouse, the keyboard, or the additional functions on the headset stop working. Additionally, you may hear some noise from the headset.

Symptoms in Windows Vista and Windows Server 2008

If the bandwidth usage of these devices is heavy, the devices may behave incorrectly.

For example, you plug a USB headset with a microphone and earphones into a USB 2.0 hub. While you listen to music from the earphones, you use the microphone to record your voice. If the music is playing at a high bit rate, and you are recording at a high sample rate, you may hear some noise from the earphones.

This problem occurs only when you plug a USB 1.1 device into an external USB 2.0 hub. It does not occur when you plug the USB device directly into the USB host controller.

Cause

This problem occurs because of some errors in the ISO transactions and in the INT transactions that occur between the USB 2.0 hub and the USB devices.

Resolution

This hotfix improves the USB scheduling and packet sequencing to comply with the USB 2.0 EHCI specification. Therefore, this problem is less likely to occur after you apply the hotfix.

Hotfix information for Windows XP

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:

http://support.microsoft.com/contactus/?ws=supportNote 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

To apply this hotfix, you must have Windows XP Service Pack 3 installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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.

File name

File version

File size

Date

Time

Platform

SP requirement

Usbehci.sys

5.1.2600.5778

30,336

18-Mar-2009

11:02

x86

SP3

Usbport.sys

5.1.2600.5778

144,000

18-Mar-2009

11:02

x86

SP3

Hotfix information for Windows Vista and for Windows Server 2008

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

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:

http://support.microsoft.com/contactus/?ws=supportNote 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

To apply this hotfix on a Windows Vista-based computer, you must have Windows Vista Service Pack 1 or a later service pack installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

935791 How to obtain the latest Windows Vista service pack

No prerequisites are required for Windows Server 2008-based computers.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 Vista and Windows Server 2008 file information notes

  • The files that apply to a specific product, milestone (RTM,SPn), and service branch (LDR, GDR) can be identified by examining the fileversion numbers as shown in the following table.

    Version

    Product

    Milestone

    Service branch

    6.0.6001.18xxx

    Windows Vista SP1 and Windows Server 2008SP1

    SP1

    GDR

    6.0.6001.22xxx

    Windows Vista SP1 and Windows Server 2008SP1

    SP1

    LDR

    6.0.6002.18xxx

    Windows Vista SP2 and Windows Server 2008SP2

    SP2

    GDR

    6.0.6002.22xxx

    Windows Vista SP2 and Windows Server 2008SP2

    SP2

    LDR

  • Service Pack 1 is integrated into Windows Server 2008.

  • The MANIFEST files (.manifest) and MUM files (.mum)installed for each environment are listed separately. MUM and MANIFEST files, andthe associated security catalog (.cat) files, are critical to maintaining thestate of the updated component. The security catalog files (attributes notlisted) are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Usb.inf

Not Applicable

40,740

30-Apr-2009

07:41

Not Applicable

Usbccgp.sys

6.0.6001.22423

73,216

30-Apr-2009

10:19

x86

Usbhub.sys

6.0.6001.22423

196,608

30-Apr-2009

10:20

x86

Hccoin.dll

6.0.6001.22423

8,704

30-Apr-2009

12:17

x86

Hcrstco.dll

6.0.6001.22423

15,872

30-Apr-2009

12:17

x86

Usbd.sys

6.0.6001.22423

5,888

30-Apr-2009

10:19

Not Applicable

Usbehci.sys

6.0.6001.22423

39,936

30-Apr-2009

10:19

x86

Usbhub.sys

6.0.6001.22423

196,608

30-Apr-2009

10:20

x86

Usbohci.sys

6.0.6001.22423

19,968

30-Apr-2009

10:19

x86

Usbport.inf

Not Applicable

59,868

30-Apr-2009

07:41

Not Applicable

Usbport.sys

6.0.6001.22423

226,816

30-Apr-2009

10:19

x86

Usbuhci.sys

6.0.6001.22423

23,552

30-Apr-2009

10:19

x86

Hccoin.dll

6.0.6002.22126

8,704

30-Apr-2009

10:01

x86

Hcrstco.dll

6.0.6002.22126

15,872

30-Apr-2009

10:01

x86

Usbd.sys

6.0.6002.22126

5,888

30-Apr-2009

10:01

Not Applicable

Usbehci.sys

6.0.6002.22126

39,936

30-Apr-2009

10:01

x86

Usbhub.sys

6.0.6002.22126

196,608

30-Apr-2009

10:01

x86

Usbohci.sys

6.0.6002.22126

19,968

30-Apr-2009

10:01

x86

Usbport.inf

Not Applicable

59,868

30-Apr-2009

07:40

Not Applicable

Usbport.sys

6.0.6002.22126

226,816

30-Apr-2009

10:01

x86

Usbuhci.sys

6.0.6002.22126

23,552

30-Apr-2009

10:01

x86

For all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Usb.inf

Not Applicable

41,060

30-Apr-2009

07:42

Not Applicable

Usbccgp.sys

6.0.6001.22423

95,744

30-Apr-2009

10:37

x64

Usbhub.sys

6.0.6001.22423

274,432

30-Apr-2009

10:37

x64

Hccoin.dll

6.0.6001.22423

10,752

30-Apr-2009

12:30

x64

Hcrstco.dll

6.0.6001.22423

17,920

30-Apr-2009

12:30

x64

Usbd.sys

6.0.6001.22423

7,680

30-Apr-2009

10:37

x64

Usbehci.sys

6.0.6001.22423

49,664

30-Apr-2009

10:37

x64

Usbhub.sys

6.0.6001.22423

274,432

30-Apr-2009

10:37

x64

Usbohci.sys

6.0.6001.22423

24,576

30-Apr-2009

10:37

x64

Usbport.inf

Not Applicable

59,996

30-Apr-2009

07:42

Not Applicable

Usbport.sys

6.0.6001.22423

260,608

30-Apr-2009

10:37

x64

Usbuhci.sys

6.0.6001.22423

29,184

30-Apr-2009

10:37

x64

Hccoin.dll

6.0.6002.22126

10,752

30-Apr-2009

12:20

x64

Hcrstco.dll

6.0.6002.22126

17,920

30-Apr-2009

12:20

x64

Usbd.sys

6.0.6002.22126

7,680

30-Apr-2009

10:32

x64

Usbehci.sys

6.0.6002.22126

49,664

30-Apr-2009

10:32

x64

Usbhub.sys

6.0.6002.22126

274,432

30-Apr-2009

10:33

x64

Usbohci.sys

6.0.6002.22126

24,576

30-Apr-2009

10:32

x64

Usbport.inf

Not Applicable

59,996

30-Apr-2009

07:40

Not Applicable

Usbport.sys

6.0.6002.22126

260,608

30-Apr-2009

10:32

x64

Usbuhci.sys

6.0.6002.22126

29,184

30-Apr-2009

10:32

x64

For all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Usb.inf

Not Applicable

40,900

30-Apr-2009

07:40

Not Applicable

Usbccgp.sys

6.0.6001.22423

208,384

30-Apr-2009

10:32

IA-64

Usbhub.sys

6.0.6001.22423

864,256

30-Apr-2009

10:32

IA-64

Hccoin.dll

6.0.6001.22423

22,528

30-Apr-2009

12:13

IA-64

Hcrstco.dll

6.0.6001.22423

24,576

30-Apr-2009

12:13

IA-64

Usbd.sys

6.0.6001.22423

11,648

30-Apr-2009

10:32

Not Applicable

Usbehci.sys

6.0.6001.22423

123,392

30-Apr-2009

10:32

IA-64

Usbhub.sys

6.0.6001.22423

864,256

30-Apr-2009

10:32

IA-64

Usbohci.sys

6.0.6001.22423

59,904

30-Apr-2009

10:32

IA-64

Usbport.inf

Not Applicable

59,932

30-Apr-2009

07:40

Not Applicable

Usbport.sys

6.0.6001.22423

647,680

30-Apr-2009

10:32

IA-64

Usbuhci.sys

6.0.6001.22423

80,896

30-Apr-2009

10:32

IA-64

Hccoin.dll

6.0.6002.22126

22,528

30-Apr-2009

11:54

IA-64

Hcrstco.dll

6.0.6002.22126

24,576

30-Apr-2009

11:54

IA-64

Usbd.sys

6.0.6002.22126

11,648

30-Apr-2009

10:11

Not Applicable

Usbehci.sys

6.0.6002.22126

123,392

30-Apr-2009

10:12

IA-64

Usbhub.sys

6.0.6002.22126

865,280

30-Apr-2009

10:12

IA-64

Usbohci.sys

6.0.6002.22126

59,904

30-Apr-2009

10:12

IA-64

Usbport.inf

Not Applicable

59,932

30-Apr-2009

07:38

Not Applicable

Usbport.sys

6.0.6002.22126

648,192

30-Apr-2009

10:12

IA-64

Usbuhci.sys

6.0.6002.22126

80,896

30-Apr-2009

10:12

IA-64

Workaround

To avoid this problem, connect the USB device directly into the host controller instead of into an external USB 2.0 hub. Or, reduce the bandwidth usage of the USB connection to reduce the possibility of experiencing this problem.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Package_for_kb968764_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,367

01-May-2009

02:46

Not Applicable

Package_for_kb968764_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,694

01-May-2009

02:46

Not Applicable

Package_for_kb968764_client~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,713

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,421

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,690

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,701

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,425

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,694

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,713

01-May-2009

02:46

Not Applicable

Package_for_kb968764_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,422

01-May-2009

02:46

Not Applicable

Package_for_kb968764_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,430

01-May-2009

02:46

Not Applicable

X86_usb.inf_31bf3856ad364e35_6.0.6001.22423_none_cb6f6a79279d6e95.manifest

Not Applicable

2,644

01-May-2009

03:56

Not Applicable

X86_usbport.inf_31bf3856ad364e35_6.0.6001.22423_none_be3962f61cb8bc7c.manifest

Not Applicable

6,734

01-May-2009

03:56

Not Applicable

X86_usbport.inf_31bf3856ad364e35_6.0.6002.22126_none_c022d5bc19dc5da5.manifest

Not Applicable

6,734

01-May-2009

03:56

Not Applicable

Additional files for all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Amd64_usb.inf_31bf3856ad364e35_6.0.6001.22423_none_278e05fcdffadfcb.manifest

Not Applicable

2,646

01-May-2009

05:22

Not Applicable

Amd64_usbport.inf_31bf3856ad364e35_6.0.6001.22423_none_1a57fe79d5162db2.manifest

Not Applicable

6,736

01-May-2009

05:22

Not Applicable

Amd64_usbport.inf_31bf3856ad364e35_6.0.6002.22126_none_1c41713fd239cedb.manifest

Not Applicable

6,736

01-May-2009

05:22

Not Applicable

Package_for_kb968764_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,375

01-May-2009

02:46

Not Applicable

Package_for_kb968764_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,706

01-May-2009

02:46

Not Applicable

Package_for_kb968764_client~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,723

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,429

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,702

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,711

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,433

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,706

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,723

01-May-2009

02:46

Not Applicable

Package_for_kb968764_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,430

01-May-2009

02:46

Not Applicable

Package_for_kb968764_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,438

01-May-2009

02:46

Not Applicable

Additional files for all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ia64_usb.inf_31bf3856ad364e35_6.0.6001.22423_none_cb710e6f279b7791.manifest

Not Applicable

2,645

01-May-2009

02:46

Not Applicable

Ia64_usbport.inf_31bf3856ad364e35_6.0.6001.22423_none_be3b06ec1cb6c578.manifest

Not Applicable

6,735

01-May-2009

02:46

Not Applicable

Ia64_usbport.inf_31bf3856ad364e35_6.0.6002.22126_none_c02479b219da66a1.manifest

Not Applicable

6,735

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,425

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,530

01-May-2009

02:46

Not Applicable

Package_for_kb968764_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,706

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,429

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,533

01-May-2009

02:46

Not Applicable

Package_for_kb968764_server~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,718

01-May-2009

02:46

Not Applicable

Package_for_kb968764_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,426

01-May-2009

02:46

Not Applicable

Package_for_kb968764_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,434

01-May-2009

02:46

Not Applicable

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