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Cake day: June 19th, 2023

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  • The TPM releases the key to the OS at boot time. Without that, there would be no way for the OS to load (assuming the root FS is encrypted).

    The key is bound to PCRs in the TPM, which control under what conditions the key can be released. For example, it can be tied to secure boot, bios settings, etc.









  • Is it giving an error code, or just glitching out? I just repaired my Samsung control board. It would glitch out (display goes nuts, relays clicking). I found that there was cracked solder joints on the main board relays. I resoldered them and it’s totally fixed now. I think the bad connection causes the relays to pulse which creates back-emf that glitches the display. Getting the board out of the potting compound is annoying and messy, but otherwise it was an easy fix.