Public bug reported: Decided to start my upgrade to 22.04 two days early (2022-04-19) from a fully patched 21.10 on AMD A6-5400K APU with Radeon HD Graphics.
I did do-release-upgrade -d and it failed to finish installing dpkg. This prevented a number of dependent packages from being installed. Here's the main error, which happens repeatedly with a manual "apt install dpkg": Preparing to unpack .../dpkg_1.21.1ubuntu2_amd64.deb ... Unpacking dpkg (1.21.1ubuntu2) over (1.20.9ubuntu2) ... Setting up dpkg (1.21.1ubuntu2) ... Installing new version of config file /etc/cron.daily/dpkg ... head: error reading 'info.bak': Is a directory dpkg: error processing package dpkg (--configure): installed dpkg package post-installation script subprocess returned error exit status 1 Errors were encountered while processing: dpkg ProblemType: Package DistroRelease: Ubuntu 21.10 Package: dpkg 1.21.1ubuntu2 ProcVersionSignature: Ubuntu 5.13.0-39.44-generic 5.13.19 Uname: Linux 5.13.0-39-generic x86_64 ApportVersion: 2.20.11-0ubuntu71.1 Architecture: amd64 CasperMD5CheckResult: unknown Date: Tue Apr 19 00:47:14 2022 DuplicateSignature: package:dpkg:1.21.1ubuntu2 Installing new version of config file /etc/cron.daily/dpkg ... head: error reading 'info.bak': Is a directory dpkg: error processing package dpkg (--configure): installed dpkg package post-installation script subprocess returned error exit status 1 ErrorMessage: installed dpkg package post-installation script subprocess returned error exit status 1 InstallationDate: Installed on 2018-01-07 (1562 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018) Python3Details: /usr/bin/python3.10, Python 3.10.4, python3-minimal, 3.10.4-0ubuntu2 PythonDetails: /usr/bin/python3.10, Python 3.10.4, python-is-python3, 3.9.2-1 RebootRequiredPkgs: Error: path contained symlinks. RelatedPackageVersions: dpkg 1.21.1ubuntu2 apt 2.3.9 SourcePackage: dpkg Title: package dpkg 1.21.1ubuntu2 failed to install/upgrade: installed dpkg package post-installation script subprocess returned error exit status 1 UpgradeStatus: Upgraded to impish on 2022-04-19 (0 days ago) ** Affects: dpkg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-package impish need-duplicate-check third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1969421 Title: 21.10 to 22.04 upgrade- package dpkg 1.21.1ubuntu2 failed to install/upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1969421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs