I've seen some motherboards with a 32-bit UEFI BIOS but an x86_64 CPU. On such computers, you can install a 64-bit Linux system, but you must use bootia32.efi to load the 64-bit Linux kernel in order to boot. If you use bootx64.efi, it won't boot.
Additionally, GRUB2 also needs to support booting Microsoft's bootmgfw.efi (using chainloader /efi/Microsoft/Boot/bootmgfw.efi). This falls under the scope of dual-boot setups, which many users use. GRUB 2.06 works fine for this, but the issue arises because GRUB 2.12 no longer supports mixed mode. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2078307 Title: Grub 2.12 is unable to boot the Windows system using the chainloader /efi/Microsoft/Boot/bootmgfw.efi. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2078307/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
