Hello,
there seems to be some strage issue between C236 chipset and Intel Xeon E3 v5 CPUs when Intel TXT(LT) is being used together with a hardware TPM module.
I noticed the following behaviour on an ASRock Rack board with plugged TPM 1.2 as well as on an ASUS Board with plugged TPM 2.0, both C236 chipset. CPU is a Xeon E3-1245 v5.
I found out that if the Xeon TXT (LT) feature is enabled in the BIOS and the TPM is plugged in, but disabled, both systems hang at POST. If the TPM is set to enabled, the system is not stuck at POST anymore, but after POST the system reboots (POST
loop). So if I want to use Intel TXT, the TPM must be physically removed. The TPM is recognized by Windows and working properly. The other way round also works, unplugging the TPM allows then to activate Intel TXT. But as TXT is made for use with a hardware TPM, that makes absolutely no sense.
Can you please assist here on how to solve this issue?
Best regards
Stefan