Re: Lost the UEFI boot info that my BIOS shows

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On 11/29/20 10:06 AM, Fulko Hew wrote:
> Have I reached a dead end, and am stuck with a re-install now?

Well you're long overdue for a fresh installation :)

The UEFI firmware mainly supports the FAT family of filesystems so yours
is probably fat16 or fat32. You need to make sure that's still there.
You should be able to mount it with:

mount -t vfat /dev/sda1 /mnt

Once you mount that make sure the PATH for the boot loader you used in
the efibootmgr exists:

/boot/efi/EFI/fedora/shimx64.efi
or
/boot/efi/EFI/fedora/grubx64.efi (for non-secure boots)

If you have those I don't see why it won't boot. You should at least get
the GRUB menu.

I'll try these 3 things:

1) search for the FAT32 partition and make sure you have the files in
there. Run efibootmgr -v and confirm the shown PATH for the boot loader
is the correct one.  If it doesn't boot and you don't have a backup for
it to restore then ...

2) try to enable CSM in your UEFI setup so that your system can boot in
BIOS mode hoping you still have a working MBR and GRUB is installed
there (see if it boots). If that doesn  work...

3) grab what you need from booting off the USB stick and be done with
it.  Install Fedora 33.

-- 
Jorge
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