16.04, initial install, system is UEFI: package shim-signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[M. Hicklen]

This is on Ubuntu 16 desktop amd64, installed to an mdadm RAID 0 and booting to the Unity desktop for the very first time. ASUS Crosshair V Formula-Z, FX-8350, 850 Evo 256G x 2 in MDADM RAID 0 only; partitions RAIDed; EFI installed to both sda1 and sdb1 (partition cloned via dd)

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: shim-signed 1.12+0.8-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Fri Jun 3 15:38:25 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: shim-signed
Title: package shim-signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Steve Langasek (vorlon)]

This bug report does not include complete log files to show the cause of the grub and shim-signed package installation failures, but it does show this error in the kernel configuration:

Generating grub configuration file ...
grub-probe: error: disk `md1' not found.

Is 'md1' the RAID0 that you were installing to?

[Launchpad Janitor (janitor)]

[Expired for shim-signed (Ubuntu) because there has been no activity for 60 days.]