Backward-Incompatible GRUB2 Change Causes BIOS Boot Loop
2024-12-16
The author's Debian and Kali Linux systems experienced boot loops after a GRUB2 update added the command `fwsetup --is-supported`. Older GRUB versions didn't recognize this parameter. The issue stemmed from an older `efifwsetup.mod` module, leftover from a system backup restoration, causing a conflict between the new GRUB configuration and the old module. Installing the `grub-efi-amd64-bin` package resolved the problem. This highlights the importance of backward compatibility in software updates and the need to consider potential side effects when making partial changes in complex software like GRUB2.
(op-co.de)
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boot loop