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Installation • Auto install doesn't work with secure boot

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I'm trying to get auto-install of Bookworm (12.6) with a preseed file working. And, in fact, it *does* work. Except that Secure Boot fails with the (BIOS) message:

Code:

Operating System Loader failed signature verification. WARNING: the file may have been tampered with!
If I disable secure boot in the BIOS the system boots up and runs just fine.

If I install via normal, interactive installation it works just fine. Literally, I used "find / -print" on both and compared the output and they are the same. The package list as obtained via "dpkg -l" is the same. I compared the files in /boot/grub/efi/EFI/debian and they are the same (the only difference is the UUID of the root partition).

This makes me believe that the interactive install is performing some kind of "secret sauce" with the UEFI bios at the end of installation, and that "secret sauce" is *not* happening when performing auto-install with a preseed file. Would anyone here have any idea what that secret sauce might be?

Secure Boot is not, in fact, a requirement for my exact situation. It's just that now I've "nerd-sniped" myself and I can't let this go until I figure it out!

Statistics: Posted by tboss — 2024-07-19 13:23 — Replies 0 — Views 15



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