this post was submitted on 16 Jul 2023
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This one at least is a known issue with a few workarounds, including manually adding a fixed shim package to a bootable usb. It should be fixed in the next release though.
I shouldn't have to do that though. Fedora should have fixed that soon after 37 was released and definitely should not have let this issue persist for as long as it had.
It is unfortunate, but the reasons are discussed in the bug report: https://bugzilla.redhat.com/show_bug.cgi?id=2113005#c52
tl;dr: Fedora cannot just build an updated shim because it has to be signed by Microsoft for secure boot support. Microsoft added a new support requirement that had (maybe still has) not been added to the kernel. Shim is not touched very often, so any distro that is using an old one that was already signed would be unaffected. I don’t know why Fedora didn’t just downgrade to one that is unaffected (I’m assuming they had compelling reasons for the upgrade in the first place), from a distro perspective that is their only option to fix the issue.