On Thu, 15 Apr 2021 23:00:22 -0700 Sunil Mohan Adapa <su...@medhas.org> wrote: > Hi, > > The problem is not limited to amd64. I see this problem on arm64. On a > FreedomBox arm64 image, on a Raspberry Pi 3B+ (when booted with UEFI > firmware[1]) when grub efi packages are upgraded, boot fails with the > error 'symbol `grub_is_lockdown` not found'. > > Links: > 1) https://github.com/pftf/RPi3 >
In my case, after uninstalling and reinstalling grub-efi-arm64* and grub?-common packages, everything worked well. This action installed additional packages (like shim-signed?) that were not present before. The problem surfaced after an upgrade, in my case, done using unattended-upgrades. This may indicate that something that is supposed to be in Depends: list is in Recommends: list. -- Sunil