On 1/15/2022 8:33 AM, Patrick O'Callaghan wrote:
On Sat, 2022-01-15 at 07:52 -0500, Jonathan Billings wrote:
On Jan 15, 2022, at 07:25, Patrick O'Callaghan
<pocallaghan@xxxxxxxxx> wrote:
I have a laptop as a secondary machine, using F35. I've
reluctantly had
to install Windows 10 on another partition, and of course Windows
has
stamped all over the boot block in its usual arrogant way so I can
no
longer access my Fedora installation (though it's still there).
What's the quickest way to get Grub back, with the Windows boot as
an
option? Can this be done from within Windows or do I need to boot a
rescue drive? Both systems use UEFI.
The great thing about UEFI is that it doesn’t involve boot sectors
anymore, it’s just files in the EFI volume and entries in the boot
firmware.
You should be able to go into your BIOS boot menu and choose the
Fedora boot entry and it should boot just fine, unless the windows
install formatted the EFI volume, but it shouldn’t by default. You
can also boot off a live USB and use ‘efibootmgr’ to change the boot
order.
Be sure to turn off Fast Reboot in the Windows settings. That
setting bypasses the normal firmware boot and you won’t see the
Fedora bootloader.
Thanks. I did manage to boot Fedora by pressing the hotkey on restart.
I really just want to add Windows as an option in the Grub menu so I
don't have to do this. I'll look at efibootmgr.
--
If you can get into Fedora, grub2-mkconfig will rebuild your boot menu
adding Windows.
--
Lester Petrie
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