What specifically do you think is wrong?  What is failing that you think 
should be working differently?

Are you confusing the EK and SRK?

What is the actual error code?  I doubt it's 0004 coming from the TPM, 
since 0004 pertains to audit, which TPMs typically did not implement.

~~

And the shameful plug.  If you debug with the SW TPM, you can get a 
trace, which greatly helps debug.

On 8/7/2013 11:07 AM, Bill Martin wrote:
> Hi folks,
>
> I have a yocto-built system running on a Kontron (arch is i686). I
> explicitly instructed the yocto to bring in tpm-tools and TrouSerS.
> And I know they are installed. I set my BIOS to clear the tpm,
> brought up the system again, and noticed
> /sys/class/misc/tpm0/device/pubek is empty. That was to be expected.
> Next I enabled the TPM in bios and reset the Kontron. After the power
> came up I noticed pubek was not empty. Moreover, I could do the
> tpm_version but my tpm_takeownership failed.
>
> I did a lot of looking through search engines and saw earlier this
> year in February someone suggested to rebuild TrouSerS with debug and
> see what is happening. That rebuild seemed to work for him.
>
> But in my case I am wondering if a previous private key was installed
> in Kontron's TPM chip, which would make the tpm_takeonership useless?
> Here's what I got...


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