Comment 7 for bug 1476882

ii grub-common 2.02~beta2-9ubuntu1.5 arm64 GRand Unified Bootloader (common files)
ii grub-efi-arm64 2.02~beta2-9ubuntu1.5 arm64 GRand Unified Bootloader, version 2 (ARM64 UEFI version)
ii grub-efi-arm64-bin 2.02~beta2-9ubuntu1.5 arm64 GRand Unified Bootloader, version 2 (ARM64 UEFI binaries)
ii grub-legacy-ec2 0.7.5-0ubuntu1.15 all Handles update-grub for ec2 instances
ii grub2-common 2.02~beta2-9ubuntu1.5 arm64 GRand Unified Bootloader (common files for version 2)

I was able to pull down the following grub debs from trusty-proposed and test on some of the affected hardware. All of the tests passed, and I was able to boot from disk, using, \efi\ubuntu\grubaa64.efi

$ uname -a
Linux cvm8 3.18.0-14.19-generic #15-Ubuntu SMP Fri Jul 31 16:08:20 UTC 2015 aarch64 aarch64 aarch64 GNU/Linux

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty