Linux-6.4.0 boots with my tpm patch. This is a definite step forward. 6.7.4 still doesn't, so I shall need to do a new bisection. I'm guessing that there is a further problem with the tpm driver, as later kernels have a lot of extra code in this area. Over the next few days I'll work on narrowing it down to two successive releases as I did before, then clone the relevant twig overnight and do a proper bisect. Thank God for the at command!
I'm convinced that the buzz which these later kernels produce is an error signal of some kind. I can't imagine random machine noise producing that perfect V-sign.
Note: This is interesting: I found it in an arcolinux forum:
Quote:
Every time I try to run the installation from grub of ArcoLinux I get an error :
'Unkown TPM Error
Unkown TPM Error
Unkown TPM Error
Failed to load /arch/boot/x86_64/vmlinuz-linux' (3 times the Unknown TPM Error and then the other one)
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Notice the pattern: three plus one. If these messages are accompanied by buzzes (the poster doesn't say), it would give the same pattern as I have been observing.