(non-UEFI) package shim-signed 1.33.1+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

[janf]

similar to other reports, this is on Ubunu 18.04 beta 2.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed 1.33.1+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.9-0ubuntu2
AptOrdering:
 shim:amd64: Install
 shim-signed:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
BootEFIContents:
 fw
 fwupx64.efi
Date: Wed Apr 11 00:32:14 2018
Df:
 Filesystem 1K-blocks Used Available Use% Mounted on
 /dev/nvme0n1p7 80247504 4264600 71863444 6% /
 /dev/sr0 1789920 1789920 0 100% /cdrom
 udev 8153724 0 8153724 0% /dev
 tmpfs 1641580 1732 1639848 1% /run
EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: EFI variables are not supported on this system.
EFITables: Apr 11 00:48:22 ubuntu1804 fwupd[4159]: disabling plugin because: failed to startup uefi: UEFI firmware updating not supported
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.6, Python 3.6.5rc1, python3-minimal, 3.6.4-1
PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu1
 apt 1.6~beta1
SourcePackage: shim-signed
Title: package shim-signed 1.33.1+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Steve Langasek (vorlon)]

Nothing in the attached logs shows output of shim-signed, and the report shows that your system is not running in UEFI mode. Do you know why shim-signed is being installed on a non-UEFI system? Did you manually install it?

[Launchpad Janitor (janitor)]

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