Comment 4 for bug 1939506
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| Ivan Hu (ivan.hu) wrote Re: [iotg] [ehl] [lookout-canyon] EHL BIOS cannot save changes to TPM settings | #4 |
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From the TCG PTP specification, section 4.6 PCR Requirements
https:/
It tells,
"
3. A conformant TPM SHALL support SHA-384 (0x000C) and SHA-256 (0x000B). The TPM MAY support
additional Hash algorithms.
a. If the TPM supports only one bank of PCRs,
i. The default Hash Algorithm ID for the PCR SHALL be defined to be 0x000B (SHA-256).
"
I supposed that uncheck the sha256 and select another will return to sha256 may be an expected behavior, you should get confirm from the Bios vendor.