attempting to install on intel compute stick

[Shabbir R Hassanally]

Attempting to install from a USB stick to the Intel Compute Stick MMC (32GB Internal MMC Drive). All is good then fails at grub install. On reboot - can't see the MMC as a valid boot device :(

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63 [modified: usr/lib/ubiquity/compat/apt-install usr/lib/ubiquity/ubiquity/frontend/base.py]
ProcVersionSignature: Ubuntu 4.4.0-21.37+ics-linuxium 4.4.6
Uname: Linux 4.4.0-21-linuxium x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CasperVersion: 1.376
Date: Wed Sep 7 22:04:05 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" Linuxium - Release Intel Compute Stick (20160610.1)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

You appear to be using a custom install image that contains unauthenticated packages.