In the process of installing updates and an unusual set of options came up regarding whether to upgrade to a newer version of grub or keep the same one. I selected the option to upgrade and this error happened.
ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: grub-efi-amd64-signed 1.74.2+2.02~beta2-36ubuntu11.2
ProcVersionSignature: Ubuntu 4.8.0-45.48-generic 4.8.17
Uname: Linux 4.8.0-45-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
Date: Tue Apr 4 12:37:59 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-01-27 (67 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
RelatedPackageVersions:
dpkg 1.18.10ubuntu1
apt 1.3.4
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.74.2+2.02~beta2-36ubuntu11.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
It appears to be stuck with the upgrade only partially completed
sudo apt upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up grub-efi-
grub-install: error: /usr/lib/
dpkg: error processing package grub-efi-
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
grub-efi-
E: Sub-process /usr/bin/dpkg returned an error code (1)