Clear TPM during deployment

Hi everyone,

I have already searched several hours through the Net and here to find a suitable solution to clear the TPM automatically during deployment without User Input or at least with a stable User Input. But I didnt.  We have a batch of new Dell Laptops (E3570, E6570 etc.) with TPM2.0 Modules where  tested the followin scenario. I have set via the Command & Configure Tool the TPM active and enabled these options:

tpmppiacpi

tpmppidpo

tpmppipo

sucessfully. If i now clear the TPM with a powershell script, reboot the machine, a BIOS prompt appear that for clear action F12 is needed to press.

So far so good, we could live with this. But in the test I found out if you leave this screen for approx. 5Minutes at this BIOS prompt the machine will boot into windows with not cleared the TPM. At the next reboot the BIOS prompt will ask again for the clear operation of the TPM. This isn´t suitable for us because we can´t guarantee that a technican is always in front of the devices during deployment and after this boot into windows all other deployment steps will try to continue but will fail because TPM hasn´t been cleared. My question is: Is there are solution to clear the TPM with out userinteraction at all or to prevent the continued boot after 5min inactive time at the BIOS prompt?

I have also seen in a blog post from 2014 that supposedly the TPM will be cleared if you run the parameter --sysdefaults=reset with the Dell Command & Configure tool. I have spoken to our Dell Pro support and they were unsure about this but said normally this won´t happen. Maybe someone can clarify this here also?

Thanks in advance.

Ben