Could not delete variable: Interrupted system call (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)

[Zubin Kavarana]

Issue on upgrade to Beta 18.04.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed 1.33.1+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
NonfreeKernelModules: wl nvidia_modeset nvidia
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
Date: Thu Mar 22 11:27:35 2018
EFITables:
 Mar 22 14:52:24 bilk kernel: efi: EFI v2.31 by INSYDE Corp.
 Mar 22 14:52:24 bilk kernel: efi: ACPI=0x9cffe000 ACPI 2.0=0x9cffe014 SMBIOS=0x9ceaef98
 Mar 22 14:52:24 bilk kernel: secureboot: Secure boot could not be determined (mode 0)
 Mar 22 14:54:40 bilk fwupd[4768]: 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
InstallationDate: Installed on 2015-09-02 (932 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
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
SecureBoot: 6 0 0 0 0
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: Upgraded to bionic on 2018-03-22 (0 days ago)

[Steve Langasek (vorlon)]

The error in your log is:

Setting up shim-signed (1.33.1+13-0ubuntu2) ...
Installing for x86_64-efi platform.
Could not delete variable: Interrupted system call
grub-install: error: efibootmgr failed to register the boot entry: Block device required.
dpkg: error processing package shim-signed (--configure):
 installed shim-signed package post-installation script subprocess returned error exit status 1

This may be a bug in efibootmgr, or in the kernel, or in your firmware. Please check whether the problem is still reproducible after rebooting and resuming the upgrade.

[Launchpad Janitor (janitor)]

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