Hi,

I'm using a F29 x86_64 UEFI install, but atm my grub is a bit of a mix-and-match between F29 and F30 as I installed all the grub2 bits from the 2.02-68.fc30 build while trying to debug bug 1672850.

So currently I have the following grub related pkgs installed:

grub2-common-2.02-68.fc30.noarch
grub2-efi-ia32-2.02-68.fc30.x86_64
grub2-efi-ia32-cdboot-2.02-68.fc30.x86_64
grub2-efi-ia32-modules-2.02-68.fc30.noarch
grub2-efi-x64-2.02-68.fc30.x86_64
grub2-efi-x64-cdboot-2.02-68.fc30.x86_64
grub2-efi-x64-modules-2.02-68.fc30.noarch
grub2-pc-2.02-68.fc30.x86_64
grub2-pc-modules-2.02-68.fc30.noarch
grub2-tools-2.02-68.fc30.x86_64
grub2-tools-efi-2.02-68.fc30.x86_64
grub2-tools-extra-2.02-68.fc30.x86_64
grub2-tools-minimal-2.02-68.fc30.x86_64
grubby-8.40-18.fc29.x86_64

Note I'm using the F29 grubby with F30 grub2 packages.

This worked fine for a while until a "dnf update" installed a new package, after that instead of a flicker-free boot I got grub switching the EFI framebuffer to text-mode to show me an error like this (more or less):

error: grub-core/kern/misc.c: 476: unrecognized number

After some poking I realized this was probably caused by the kernel install changing saved_entry in the grubenv:

[hans@shalem ~]$ sudo grub2-editenv list
menu_auto_hide=1
boot_success=1
boot_indeterminate=0
saved_entry=d065aaf19da60f6fae055d00473369ee-4.20.6-200.fc29.x86_64
kernelopts=root=UUID=cec677c9-c890-4103-b94a-bcc191642935 ro rd.md=0 rd.dm=0 rd.lvm=0 quiet rhgb

After doing a "sudo grub2-set-default 0" the error at boot went away.

Regards,

Hans