Thinkpad E14 Gen 2 Fn Keys Fix

Intro

TESTED ON VERSION 1.10
NOTICE: This currently does NOT work with automatically generated GRUB config file (changes will not survive GRUB update)
Please use the linked script bellow or create PR as I don't use GRUB at all.

I wrote this script as a more universal way of fixing Fn keys on Thinkpad E14 gen 2.
Please note that there is an another script, but it only works with GRUB and touches system (which I don't like)

Run

Run script to generate acpi_override.img:
./create_img.sh
or add -c flag to clean junk files after run:
./create_img.sh -c

Installing acpi_override.img

Copy the file to /boot first:
sudo cp acpi_override.img /boot

GRUB

• NOTICE: Currently works only if you manage your GRUB config file manually (changes will not survive GRUB update)
• Edit /boot/grub/grub.cfg

    ...
    echo 'Loading initial ramdisk'
    initrd /boot/acpi_override.img /boot/initramfs-linux.img
    ...

Refind

• If you use /boot/refind_linux.conf:
  • Add initrd=\boot\acpi_override.img (notice backslashes) as the first initrd option:

    "Some name" "<... splash initrd=\boot\acpi_override.img initrd=\boot\initrd.img-%v-generic"

• If you use refind.conf (/boot/EFI/BOOT/refind.conf)
  • Add initrd=\boot\acpi_override.img (notice backslashes) at the end of the options:

      menuentry "Arch Linux" {
          icon     /EFI/refind/icons/os_arch.png
          volume   "Arch Linux"
          loader   /boot/vmlinuz-linux
          initrd   /boot/initramfs-linux.img
          options  "root=PARTUUID=... rw add_efi_memmap initrd=\boot\acpi_override.img"
          submenuentry "Boot using fallback initramfs" {
              initrd /boot/initramfs-linux-fallback.img
          }
          submenuentry "Boot to terminal" {
              add_options "systemd.unit=multi-user.target"
          }
          disabled
      }
      

Resources

• ASL tutorial: link
• Refind automatic boot stanza with ACPI override: link
• Thinkpad Carbon X1 Gen6, S3 state fix: link
• Another working script (but it is GRUB only): link