                                                                   Revision : 01
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Software name      Intel Thunderbolt Driver for Windows 10

Support models     ThinkPad X1 Carbon 7th (Machine types: 20QD, 20QE, 20R1, 20R2)
                   ThinkPad X1 Yoga 4th   (Machine types: 20QF, 20QG, 20SA, 20SB)

Operating System   Microsoft Windows 10 64-bit (Version 1709 or later)

                   Refer to marketing materials to find out what computer models
                   support which Operating Systems.

Version            1.41.729.0

Support device     Thunderbolt Controller-15D2


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WHAT THIS PACKAGE DOES

  This package installs the software (Thunderbolt software and device drivers)
  to enable the following devices.

  Device name                    Device name in the Device Manager
  ---------------------------    ---------------------------------
  Thunderbolt Controller-15D2    Thunderbolt(TM) Controller-15D2

  Refer to marketing materials to find out what computer models support which
  devices.

  If this package has been installed, updating (overwrite-installing) this
  package will fix problems, add new functions, or expand functions as noted
  below.

  This program is language independent and can be used with any language system.


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CHANGES IN THIS RELEASE
  Version 1.41.729.0

[Important updates]
 Nothing.

[New functions or enhancements]
 Nothing.

[Problem fixes]
- Fixed peer to peer connectivity issues.
- Fixed device enumeration and incorrect topology issues during unplug.
- Fixed Titan Ridge dock recognition issue in Thunderbolt Control Center.

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DETERMINING WHICH VERSION IS INSTALLED


  1. Hold down the Windows logo key and press X to open a menu at the lower-left
     area of the screen.
  2. Select Device Manager from the menu.
  3. Double-click the System devices category.
  4. Double-click one of the following devices depending on product type.
       Thunderbolt Controller-15D2
  5. Select the Driver tab.
  6. Check Driver Version.


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NOTES

- You need to install Thunderbolt Control Center from Microsoft Store app if
  it is not installed yet.

  You can find Thunderbolt Control Center on Microsoft Windows Store app.

  If your system uses the preload environment, Thunderbolt Control Center is
  already installed.


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INSTALLATION INSTRUCTIONS

Notes:
- If your computer runs satisfactorily now, it may not be necessary to update
  the software. To determine if you should update the software, refer to the
  Version Information section.


[Using EXE file]

  This section assumes to use Internet Explorer and Windows Explorer.

  Downloading file
  1. Select the underlined file name. Once this is done, some pop-up windows
     will appear.
  2. Follow the instructions on the screen.
  3. In the window to choose Run or Save, select Save.
  4. Choose the folder you would like to download the file to, and select Save.
     A different window will appear and the download will begin and complete.
     Once the download has completed, there may or may not be a message stating
     that the download completed successfully.

  Extracting files
  5. Make sure to be logged on with an administrator account.
  6. Locate the folder where the file was downloaded.
  7. Locate the file that was downloaded and double-click/double-tap it.
  8. Follow the instructions on the screen.
  9. In the Select Destination Location window, select Next. If you would like
     to select a different folder, select Browse.
 10. In the Ready to Install window, select Install. All the necessary files
     will be extracted to the folder selected in the step 9.

  Installing files
 11. Wait for the setup to complete the installation and restart the computer.
     IMPORTANT: Make sure to restart the computer after installation.

  Finally delete the file saved in the step 4.


[Using Command Prompt]

  This is for system administrator's use only.

  1. Refer to the Installation using EXE file section, locate the extracted file
     in step 9.
  2. Using command prompt with administrator privileges, execute Setup.bat.
     Example:
     [Path where the files were extracted]\Setup.bat
  3. When installation is completed, restart the computer.


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UNINSTALLATION INSTRUCTIONS

[Using Device Manager]

  1. Hold down the Windows logo key and press X to open a menu at the lower-left
     area of the screen.
  2. Select Device Manager from the menu.
  3. Double-click the System devices category.
  4. Double-click one of the following devices depending on product type.
       Thunderbolt Controller-15D2
  5. Select the Driver tab.
  6. Click "Uninstall Device" button.

[Using Command Prompt]

  This is for system administrator's use only.

  1. Refer to the Installation using EXE file section, locate the extracted file
     in step 9.
  2. Using command prompt with administrator privileges, execute Uninstall.bat
     Example:
     [Path where the files were extracted]\Uninstall.bat
  3. When uninstallation is completed, restart the computer.

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VERSION INFORMATION

  The following versions have been released to date.

  Build ID  Device Manager  Rev.  Issue Date
  --------  --------------  ----  ----------
  N2HTA09W  1.41.729.0      01    2019/11/28
  N2HTA08W  1.41.648.5      01    2019/09/20
  N2HTA07W  1.41.645.0      01    2019/05/29
  N2HTA06W  1.41.613.1      01    Preload


  Note: Revision number (Rev.) is for administrative purpose of this README
        document and is not related to software version. There is no need to
        upgrade this software when the revision number changes.

  To check the version of software, refer to the Determining which version is
  installed section.


Summary of Changes

  Where: <   >        Version number
         [Important]  Important update
         (New)        New function or enhancement
         (Fix)        Correction to existing function

<1.41.729.0> (N2HTA09W)
-(Fix) Fixed peer to peer connectivity issues.
-(Fix) Fixed device enumeration and incorrect topology issues during unplug.
-(Fix) Fixed Titan Ridge dock recognition issue in Thunderbolt Control Center.

<1.41.648.5> (N2HTA08W)
-(New) Added support for following products.
                ThinkPad X1 Carbon Gen 7 (Machine types: 20R1, 20R2)
                ThinkPad X1 Yoga Gen 4   (Machine types: 20SA ,20SB)
-(Fix) Fixed BSOD 0x50 (PAGEFAULT-IN-NONPAGEDAREA) during NVM reading of
       device or controller issue.
-(Fix) Fixed sporadic BSOD SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (7e) and system
       hang on S3/S4 issue.
-(Fix) Fixed Thunderbolt P2P connection and enumeration issues during hotplug
       on S3/S4.

<1.41.645.0> (N2HTA07W)
-(Fix) Fixed sporadic BSOD (DRIVER_POWER_STATE_FAILURE) in Modern Standby.
-(Fix) Fixed Thunderbolt Controller appearance in Safely Remove Hardware and
       Eject Media issue when no Thunderbolt device is present.
-(Fix) Fixed some P-to-P 2.0 charging issues.

<1.41.613.1> (N2HTA06W)
-(New) Initial release for ThinkPad X1 Carbon 7th (Machine types: 20QD, 20QE)
                           ThinkPad X1 Yoga 4th   (Machine types: 20QF, 20QG).


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LIMITATIONS

  Nothing.


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TRADEMARKS

* Lenovo and ThinkPad are registered trademarks of Lenovo.

* Intel is a registered trademark of Intel Corporation.
* Microsoft, Internet Explorer and Windows are registered trademarks of
  Microsoft Corporation.
* Thunderbolt is a trademark of Intel Corporation.

Other company, product, and service names may be registered trademarks,
trademarks or service marks of others.
