package grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Leslie Satenstein]

Immediate problem after reinstallation using zfs.

The initial installation was overwritten.

The initial installation did not allow updating grub.cfg

I do not know what is wrong, but I suspect it is grub (os-prober) ??

ProblemType: Package
DistroRelease: Ubuntu 20.10
Package: grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
NonfreeKernelModules: nvidia zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Jan 26 00:07:25 2021
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.6-0ubuntu1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.20.5ubuntu2
 apt 2.1.10
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess 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.

[ger tielemans (gjtielemans)]

got this later on:

dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.
ger@ger-ubuntu:~$ sudo dpkg --configure -a
Setting up grub-efi-amd64-signed (1.155.2+2.04-1ubuntu35.2) ...
Installing grub to /boot/efi.
Installing for x86_64-efi platform.
Installation finished. No error reported.
Setting up linux-image-5.8.0-41-generic (5.8.0-41.46) ...
Processing triggers for linux-image-5.8.0-41-generic (5.8.0-41.46) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.8.0-41-generic
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.8.0-41-generic
Found initrd image: /boot/initrd.img-5.8.0-41-generic
Found linux image: /boot/vmlinuz-5.8.0-25-generic
Found initrd image: /boot/initrd.img-5.8.0-25-generic
Adding boot menu entry for UEFI Firmware Settings

[Jonners59 (jonathan-l-harrison)]

I didn't get that message, but tried it myself. sudo dpkg --configure -a did absolutely nothing.

[Steve Langasek (vorlon)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1928352, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.