OpenTC HOWTO series - PoC
=========================

Title:          HOWTO clear and reactivate the TPM on the HP nx6325
Author(s):      Wolfgang Weidner (HP), Stephane Lo Presti (RHUL)
Revision date:  2007-06-12
Audience:       user, developer
PoC version:    otc-suse-pet-1.0.1, otc-dsl-pet-1.0, otc-suse-ccah-1.0


Preliminary notes
-----------------

This HOWTO is complementary to the test instructions document because it 
specifies how to clear and reactivate the TPM of a selected platform, 
an operation that required in some procedures described in the test procedure.


Prerequisites
-------------

You must have the version F.04 of the BIOS installed, check this webpage:
http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?&lang=en&cc=uk&pnameOID=1849083&taskId=135&prodTypeId=321957&prodSeriesId=1849082&lang=en&cc=uk


Procedure
---------

1) Clear the TPM ownership:
   - Enter the BIOS settings (press F10 when you see the line "F10=ROM Based
     Setup" only);
   - Enter the "Security" section, then "TPM Embedded Security";
   - Set "Reset to Factory Settings" from "No" to "Yes";
   - Save and exit (confirm with F10).

2) During the following boot, answer "Yes" when asked "Clear the TPM?"
   (clearing also deactivates the TPM).

3) Re-Activate the TPM:
   - enter the BIOS settings;
   - enter the "Security" section, then "TPM Embedded Security";
   - set "Embedded Security Device State" from "Disable" to "Enable";
   - save and exit (confirm with F10).

4) During the following boot, answer "Yes" when asked "Activate the TPM?".