Antergos / Archlinux EFI fix

• commands to remember

  • # mkinitcpio -p linux
    # bootctl --path=/boot install

  • lsblk -f
    parted -l

  • You can use the live environment to chroot into your installation. Then you can try regenerating your initramfs and grub configs.

    # Install arch-install-scripts
    pacman -S arch-install-scripts
    # Mount Antergos Root
    mount /dev/sdxX /mnt
    # Mount EFI
    mount /dev/sdxX /mnt/boot
    # Chroot into your installed root
    arch-chroot /mnt 
    # Generate kernel/initramfs images
    mkinitcpio -p linux
    # Generate grub config
    grub-mkconfig -o /boot/grub/grub.cfg
    # Exit Chroot
    exit
    # Unmount partitions
    umount -R /mnt
    # Cross your fingers and reboot ;-)
    reboot

• References:

  • EFI stub: ERROR: failed to read file. I can't boot!
    [[https://bbs.archlinux.org/viewtopic.php?pid=1514912#p1514912]]
  • Installation >> dual boot doesn't work [SOLVED]
    [[https://bbs.archlinux.org/viewtopic.php?id=202634]]
  • Enabling Intel microcode updates
    [[https://wiki.archlinux.org/index.php/Microcode#Enabling_Intel_microcode_updates]]
  • Getting efi error when booting [solved]
    [[https://forum.antergos.com/topic/2198/getting-efi-error-when-booting-solved/4]]

• Microcode updates for UEFI:
  [[https://wiki.archlinux.org/index.php/Microcode#Enabling_Intel_microcode_updates]]

  • systemd-boot
    Use the initrd option to load the microcode, before the initial ramdisk, as follows:

    
    /boot/loader/entries/entry.conf

title Arch Linux
linux /vmlinuz-linux
initrd /intel-ucode.img
initrd /initramfs-linux.img

    The latest microcode intel-ucode.img must be available at boot time in your EFI System Partition (ESP). The ESP must be mounted as /boot in order to have the microcode updated every time intel-ucode is updated. Otherwise, copy /boot/intel-ucode.img to your ESP at every update of intel-ucode. 

Further reading
---------------
+ efibootmgr  [[https://linux.die.net/man/8/efibootmgr]]