On Wed, Apr 17, 2024 at 11:48 AM Klaus-Peter Schrage via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
After many years of maintaing dual boot setups (Fedora/Windows) my
harddisk layout got a bit confusing: Linux and Windows partition were
scattered on mainly two harddisks (all gpt). I was able to free a third
harddisk (ssd) and copied the linux partitions boot, root and home over
to the new disk, where they now reside as /dev/sda1, /dev/sda2
and /dev/sda3.
In preparation for converting my dual boot Win10+Fedora system
to Fedora only, I needed to expand the Win11 partition on another
dual boot system because some "mission critical" Adobe PDF documents
require Windows.
I used gparted to shrink the Linux partition, move a couple small partitions
to the end of the resulting free space, and expand Win11 to use the free space.
Fedora booted without issues, Windows did some "repairs", but everything
is working.
I left the efi-partition on the disk /dev/sdc together with Windows 11.
As in /etc/fstab all partitions are identified by their UUID, I didn't
feel a need to adjust that file.
Trying to boot brought me to the grub command line prompt. After some
trial and error, the appropriate sequence of grub commands (set
root=..., linux ..., initrd ...) made the system boot into a fully
working Fedora 39 installation.
From there I tried to repair GRUB2, following the guidelines at
https://fedoraproject.org/wiki/GRUB_2?rd=Grub2#Updating_GRUB_2_configuration_on_UEFI_systems
namely those three steps:
# rm /boot/efi/EFI/fedora/grub.cfg
# rm /boot/grub2/grub.cfg
# dnf reinstall shim-* grub2-efi-* grub2-common
But rebooting still gets me to the dreaded grub>.
So what am I missing?
I assume you can still boot with manual grub commands.
Retrace your steps and double check UUID's, other typos, and
misplaced quotes.
Recheck /etc/fstab and /etc/default/grub. You can also check
for errors in the /etc/grub.d/10_linux section of /boot/grub2/grub.cfg.
As a final resort, you can edit /etc/grub2/40_custom to boot Fedora so
you have two chances (trying different configs) to boot Fedora at each attempt.
BTW, I did NOT use the grub2-install command which shoud not be used on
UEFI systems.
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George N. White III
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