This shit again... I moved to LTS kernel exactly because of this bug and now it reached LTS kernel as well...
this post was submitted on 19 Aug 2023
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I like how it's readable both in present and past tenses hehe
Huh, this might be one of the few examples of "don't break userspace" not being held to by Linus and co? I'm sure stuff like this has happened before, but "don't break userspace" has been a fairly strong guiding principle for the kernel for sometime. So seeing something like this happen is actually a bit surprising.
Though I guess it could be argued that if the removal of fTPM causes fewer bugs/issues than leaving it in place then userspace wasn't broken. But still, it's interesting to see regardless.
I've had fTPM issues with the bios because I changed CPUs and lost key attestation. Maybe it's my fault, but the reset process isn't documented anywhere clearly and it's not worth digging up my old CPU to reset the Mobo.
Is it still broken even if you have TPM completely shut off in UEFI?
It sound like what's broken is the TPM. So if it is shut off it would be both broken and off, and you might not care about the broken.
What's a good usecase for TPM in Linux?
You can't trust any full disk encryption without it because only a TPM can verify that your bootloader and initrd are not compromised.
Measured boot.