Acer UEFI workaround

check-uefi.service

[Unit]
Description=Checks for enforced Windows Boot Manager & updates it

[Service]
ExecStart=/usr/local/bin/update_uefi.sh

[Install]
WantedBy=multi-user.target

update_uefi.sh

#!/bin/bash

check_bootmgfw() {
  if [ -e /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi ]; then
    echo 1;
  else
    echo 0;
  fi
}

move_bootmgfw() {
  echo "==> Checking for existing windows.efi file";
  if [ -e /boot/efi/EFI/Microsoft/Boot/windows.efi ]; then
    rm /boot/efi/EFI/Microsoft/Boot/windows.efi;
  fi

  echo "==> Moving bootmgfw.efi to windows.efi";
  mv /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi /boot/efi/EFI/Microsoft/Boot/windows.efi;
}

update_uefi_settings() {
  echo "==> Deleting Windows Boot Manager entry";
  efibootmgr -b $1 -B;

  current_boot_order=$(efibootmgr | sed -rn 's/BootOrder:\ (.*)/\1/p');
  echo "==> Current boot order: $current_boot_order";

  echo "==> Creating Windows boot entry";
  efibootmgr -b $1 -c -l '/EFI/Microsoft/Boot/windows.efi' -L Windows;

  echo "==> Changing boot order"
  efibootmgr -o $current_boot_order,$bootmgfw_entry
}

if [ $(check_bootmgfw) -eq 1 ]; then
  echo "==> bootmgfw.efi exists";

  bootmgfw_entry=$(efibootmgr | sed -rn 's/Boot(.{4})\*\ Windows\ Boot\ Manager/\1/p');
  echo "==> Windows Boot Manager entry: $bootmgfw_entry";

  move_bootmgfw;
  update_uefi_settings $bootmgfw_entry;
else
  echo "==> bootmgfw.efi doesn't exist... exiting";
fi