package grub-pc 2.04-1ubuntu26 failed to install/upgrade: installed grub-pc package post-installation script subprocess was killed by signal (Aborted)

[Sergio Silvestrini]

Replaced hard disk

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: grub-pc 2.04-1ubuntu26
ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
Uname: Linux 4.15.0-112-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Jul 23 16:32:19 2020
ErrorMessage: installed grub-pc package post-installation script subprocess was killed by signal (Aborted)
InstallationDate: Installed on 2016-10-06 (1386 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-112-generic root=UUID=c8f897e7-37ef-480d-8cad-8171d126799c ro quiet splash vt.handoff=1
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SourcePackage: grub2
Title: package grub-pc 2.04-1ubuntu26 failed to install/upgrade: installed grub-pc package post-installation script subprocess was killed by signal (Aborted)
UpgradeStatus: Upgraded to focal on 2020-07-23 (0 days ago)

[Launchpad Janitor (janitor)]

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

[Julian Andres Klode (juliank)]

Reassigning to gtk+3.0 though I don't really know what to do here, we need gtk operational during upgrades to show prompts.

(frontend:10148): Gtk-WARNING **: 16:28:16.133: Could not load a pixbuf fro icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.

Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/48x48/status/image-missing.png: Formato del file di immagine non riconosciuto (gdk-pixbuf-error-quark, 3)
Bail out! Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/48x48/status/image-missing.png: Formato del file di immagine non riconosciuto (gdk-pixbuf-error-quark, 3)