Bug#984760: grub-pc: upgrade works, boot fails (error: symbol `grub_is_lockdown` not found)

[Sunil Mohan Adapa]

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

Thanks,

-- 
Sunil