** Description changed: [ Impact ] The bug prevents upgrades from 24.04 LTS to 26.04 LTS if `lintian` is alonsgide a larger number of packages, such as `ubuntu-desktop`. This is caused by the APT resolver's strictness in introducing the new dependency required by `lintian` in 26.04 LTS. Without the fix, users need to manually identify the issue and uninstall `lintian` before upgrading, which is a significant barrier to adoption of the new LTS release. The fix solves the bug by marking `lintian`'s new dependency `libfile-libmagic-perl` for install if `lintian` is installed, which allows the APT resolver to successfully resolve the upgrade path without requiring users to manually intervene. [ Test Plan ] 1. Launch a 24.04 LTS container or VM, using e.g. LXD: $ lxc launch ubuntu:24.04 sru-lintian-fix (See https://documentation.ubuntu.com/lxd/latest/tutorial/first_steps/) 2. Install `lintian` and the `ubuntu-desktop` meta-package (this can take a while): - $ lxc exec sru-lintian-fix -- apt update + $ lxc exec sru-lintian-fix -- apt update && apt upgrade -y $ lxc exec sru-lintian-fix -- apt install lintian ubuntu-desktop 3. Attempt to upgrade to 26.04 LTS: $ lxc exec sru-lintian-fix -- do-release-upgrade -d This will fail with the following error: "Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade." [ Where problems could occur ] The fix itself should only affect upgrades from Noble on systems with `lintian` installed. On these systems, the most prominent error arises if the added quirk is run too early or too late in the upgrade process, which would cause the APT resolver to still fail to resolve the upgrade path. Another breakage could occur if some other package conflicts with the new dependency `libfile-libmagic-perl`, which would cause the upgrade to fail with a different error message. [ Other Info ] This specific bug is caused by a combination of resolver strictness and the dependency graph for `lintian`. More specifically: 1. The new version of the dependency `libyaml-libyaml-perl` on Resolute breaks the `lintian` version on Noble. 2. `lintian` needs to be upgraded to its latest version to be compatible with `libyaml-libyaml-perl`. 3. The latest version of `lintian` introduces a new dependency `libfile-libmagic-perl`, but the APT resolver does not favor this upgrade path. As such the most apparent fix was to add a quirk since nothing in the packaging itself was broken, but the resolver's behavior was not ideal for this specific case. [ Original Bug Description ] Checking package manager Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating the changes Calculating the changes Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade. If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If you want to investigate this yourself the log files in '/var/log/dist-upgrade' will contain details about the upgrade. Specifically, look at 'main.log' and 'apt.log'. Restoring original system state Aborting Reading package lists... Done Building dependency tree... Done Reading state information... Done --- From /var/log/dist-upgrade/main.log: 2026-04-25 10:49:52,862 DEBUG running doUpdate() (showErrors=True) 2026-04-25 10:49:55,388 DEBUG openCache() 2026-04-25 10:49:55,746 DEBUG Comparing 6.8.0-107 with 2026-04-25 10:49:55,746 DEBUG Comparing 6.8.0-110 with 6.8.0-107 2026-04-25 10:49:55,785 DEBUG /openCache(), new cache size 81819 2026-04-25 10:49:55,883 DEBUG Foreign (before rewriting sources): 1password 1password-cli buildah ffmpeg fig2dev firefox gh gimp gimp-data gir1.2-gst-plugins-bad-1.0 google-chrome-stable gstreamer1.0-plugins-bad imagemagick imagemagick-6-common imagemagick-6.q16 libavcodec60 libavdevice60 libavfilter9 libavformat60 libavutil58 libcjson1 libgimp2.0t64 libgstreamer-plugins-bad1.0-0 libimage-magick-perl libimage-magick-q16-perl libmagick++-6.q16-9t64 libmagickcore-6.q16-7-extra libmagickcore-6.q16-7t64 libmagickwand-6.q16-7t64 libmbedcrypto7t64 libmbedtls14t64 libmbedx509-1t64 libpostproc57 libqt5core5t64 libqt5dbus5t64 libqt5gui5t64 libqt5network5t64 libqt5widgets5t64 libswresample4 libswscale7 libvlc-bin libvlc5 libvlccore9 libzvbi-common libzvbi0t64 podman podman-docker python3-filelock python3-fonttools python3-virtualenv qt5-gtk-platformtheme vlc vlc-bin vlc-data vlc-l10n vlc-plugin-access-extra vlc-plugin-base vlc-plugin-notify vlc-plugin-qt vlc-plugin-samba vlc-plugin-skins2 vlc-plugin-video-output vlc-plugin-video-splitter vlc-plugin-visualization 2026-04-25 10:49:55,883 DEBUG Foreign (after rewriting sources): 2026-04-25 10:49:55,883 DEBUG running Quirks.PreDistUpgradeCache 2026-04-25 10:49:56,344 ERROR Dist-upgrade failed: 'W:Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://dl.google.com/linux/chrome-stable/deb stable InRelease' doesn't support architecture 'i386', E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.' 2026-04-25 10:49:56,348 DEBUG abort called 2026-04-25 10:49:56,349 DEBUG openCache() 2026-04-25 10:49:57,552 DEBUG Comparing 6.8.0-107 with 2026-04-25 10:49:57,552 DEBUG Comparing 6.8.0-110 with 6.8.0-107 2026-04-25 10:49:57,628 DEBUG /openCache(), new cache size 103198 ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: ubuntu-release-upgrader-core 1:24.04.28 ProcVersionSignature: Ubuntu 6.8.0-107.107-generic 6.8.12 Uname: Linux 6.8.0-107-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 CasperMD5CheckResult: pass CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Sat Apr 25 10:51:38 2026 InstallationDate: Installed on 2022-06-07 (1418 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419) PackageArchitecture: all ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/zsh TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: ubuntu-release-upgrader UpgradeStatus: Upgraded to noble on 2026-04-25 (0 days ago) VarLogDistupgradeAptHistorylog: Start-Date: 2026-04-25 10:49:40 Requested-By: ari (1000) End-Date: 2026-04-25 10:49:40 VarLogDistupgradeApttermlog: Log started: 2026-04-25 10:49:40 Log ended: 2026-04-25 10:49:40
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2150319 Title: [SRU] lintian breaks upgrade from 24.04 to 26.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libfile-libmagic-perl/+bug/2150319/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
