Re: Unable to boot UEFI installation

[Pertti Kosunen <pertti.kosunen@pp.nic.fi>]

On 20.7.2013 22:16, Marcus Karlsson wrote:
> Does anyone know why this happens or what I can do about it, apart from
> renaming the installed boot loader directory?

Here are my notes for switching from legacy BIOS mode to UEFI, manual 
grub binary and config install might help.


# Booted in legacy BIOS mode
# /boot/efi = FAT32 UEFI partition (/dev/sda1)
mkdir -p /boot/efi/EFI/grub

# Remove every grub package installed including confs
aptitude purge grub-common grub-efi-amd64 grub-efi-amd64-bin grub-pc \
  grub-pc-bin grub2-common
# Install UEFI grub
aptitude install grub-efi-amd64

# Install grub binary to UEFI partition
grub-install --target=x86_64-efi --efi-directory=/boot/efi \
  --bootloader-id=grub --boot-directory=/boot/efi/EFI --recheck --debug
# Create grub.cfg to UEFI partition
grub-mkconfig -o /boot/efi/EFI/grub/grub.cfg

# Reboot to UEFI Shell and run grubx64.efi
fs0:
cd EFI
cd grub
grubx64.efi

# Set grub to 1st boot option (-p [partition number])
efibootmgr -c -d /dev/sda -p 1 -w -L "grub" -l '\EFI\grub\grubx64.efi'


# Manual grub.cfg copy needed every time after updating grub
cp /boot/grub/grub.cfg /boot/efi/EFI/grub/grub.cfg


https://wiki.archlinux.org/index.php/GRUB

Arch wiki has more info.