I have verified the fix using ubuntu-release-upgrader from noble- proposed using a xubuntu 22.04 VM:
ubuntu@xubuntu:~$ sudo sed -i 's/Prompt=lts/Prompt=normal/g' /etc/update-manager/release-upgrades [sudo] password for ubuntu: ubuntu@xubuntu:~$ do-release-upgrade --proposed Checking for a new Ubuntu release = Welcome to Ubuntu 24.04 LTS 'Noble Numbat' = The Ubuntu team is proud to announce Ubuntu 24.04 LTS 'Noble Numbat'. To see what's new in this release, visit: https://wiki.ubuntu.com/NobleNumbat/ReleaseNotes [ ...SNIP... ] In another terminal, while the upgrade was running: ubuntu@xubuntu:~$ cat /etc/resolv.conf # This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8). # Do not edit. # # This file might be symlinked as /etc/resolv.conf. If you're looking at # /etc/resolv.conf and seeing this text, you have followed the symlink. # # This is a dynamic resolv.conf file for connecting local clients directly to # all known uplink DNS servers. This file lists all configured search domains. # # Third party programs should typically not access this file directly, but only # through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a # different way, replace this symlink by a static file or a different symlink. # # See man:systemd-resolved.service(8) for details about the supported modes of # operation for /etc/resolv.conf. nameserver 10.19.111.1 nameserver fd42:3cda:638d:a9b3::1 nameserver fe80::216:3eff:fe07:85b6%2 search lxd ubuntu@xubuntu:~$ cat /run/systemd/resolved.conf.d/dist-upgrade-no-stub-resolver.conf # Temporarily disable stub resolver during upgrade [Resolve] DNSStubListener=no ubuntu@xubuntu:~$ tail /var/log/dist-upgrade/main.log 2024-08-12 16:21:57,233 DEBUG dir '/tmp' needs '0.0' of '<DistUpgrade.DistUpgradeCache.MyCache.checkFreeSpace.<locals>.FreeSpace object at 0x731e8275c940>' (14185896140.600000) 2024-08-12 16:21:57,233 DEBUG dir '/usr' needs '0.0' of '<DistUpgrade.DistUpgradeCache.MyCache.checkFreeSpace.<locals>.FreeSpace object at 0x731e8275c940>' (14185896140.600000) 2024-08-12 16:21:57,233 DEBUG Found writable ESP /dev/sda1 /boot/efi vfat rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0 2024-08-12 16:21:57,242 DEBUG quirks: running StartUpgrade 2024-08-12 16:21:57,242 DEBUG running Quirks.StartUpgrade 2024-08-12 16:21:57,243 DEBUG skipping 'README' (no '.') 2024-08-12 16:21:57,244 DEBUG killing update-notifier 2024-08-12 16:21:57,248 DEBUG killing kblueplugd kbluetooth4 2024-08-12 16:21:57,251 DEBUG Disabling systemd-resolved stub resolver during upgrade 2024-08-12 16:21:57,354 INFO cache.commit() And after the upgrade was complete: ubuntu@xubuntu:~$ apt policy chromium-browser chromium-browser: Installed: 2:1snap1-0ubuntu2 Candidate: 2:1snap1-0ubuntu2 Version table: *** 2:1snap1-0ubuntu2 500 500 http://us.archive.ubuntu.com/ubuntu noble/universe amd64 Packages 100 /var/lib/dpkg/status ubuntu@xubuntu:~$ snap info chromium name: chromium summary: Chromium web browser, open-source version of Chrome publisher: Canonical✓ store-url: https://snapcraft.io/chromium contact: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bugs?field.tag=snap license: unset description: | An open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. commands: - chromium.chromedriver - chromium snap-id: XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R tracking: latest/stable refresh-date: today at 16:30 EDT channels: latest/stable: 127.0.6533.99 2024-08-12 (2925) 174MB - latest/candidate: 127.0.6533.99 2024-08-07 (2925) 174MB - latest/beta: 128.0.6613.27 2024-08-08 (2926) 181MB - latest/edge: 129.0.6614.3 2024-07-29 (2920) 181MB - installed: 127.0.6533.99 (2925) 174MB - ** Tags removed: verification-needed verification-needed-noble ** Tags added: verification-done verification-done-noble -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/2043820 Title: Unable to contact snap store on Xubuntu from Jammy to Noble Status in firefox package in Ubuntu: Confirmed Status in snapd package in Ubuntu: Confirmed Status in ubuntu-release-upgrader package in Ubuntu: Invalid Status in firefox source package in Noble: Confirmed Status in snapd source package in Noble: Confirmed Status in ubuntu-release-upgrader source package in Noble: Fix Committed Bug description: [Impact] Upgrades from Jammy to Noble can fail if snap transition packages are installed after the new systemd has been unpacked, but before systemd- resolved has been unpacked. In practice, this manifests on at least Xubuntu upgrades during the chromium-browser snap transition. [Test Plan] Without this fix, the snap store connectivity check will fail when installing the chromium-browser snap because systemd-resolved is not present, so DNS lookups fail during the connectivity check. With the fix in place, the systemd-resolved stub resolver should be disabled during the upgrade so that DNS lookups succeed even when systemd-resolved is not yet unpacked on the system again. So, to test this fix, we should run an upgrade on a Xubuntu 22.04 system: $ do-release-upgrade -d And verify that (a) the chromium-browser installation (and snap store connectivity check) succeeds, and (b) that the stub resolver is not in use during the upgrade. $ cat /etc/resolv.conf $ cat /run/systemd/resolved.conf.d/dist-upgrade-no-stub-resolver.conf [Where problems could occur] This patch disables the systemd-resolved stub resolver by writing a drop-in to /run/systemd/resolved.conf.d. If there was a mistake in the drop-in, it would not correctly disable the stub resolver. [Original Description] When running `do-release-upgrade -d` on Jammy Xubuntu, the upgrade fails consistently at the `Installing the firefox snap` step. This was first detected on Jenkins [1], then reproduced locally with `auto-upgrade-testing`, then finally by manually running a `do- release-upgrade -d` in a VM. [1]: https://platform-qa-jenkins.ps5.ubuntu.com/view/upgrade- list/job/upgrade_ubuntu-jammy-noble-xubuntu-amd64_qemu/7/consoleFull (Jenkins full log attached) ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: ubuntu-release-upgrader-core 1:22.04.17 ProcVersionSignature: User Name 5.15.0-88.98-generic 5.15.126 Uname: Linux 5.15.0-88-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: unknown CrashDB: ubuntu CurrentDesktop: XFCE Date: Fri Nov 17 18:24:22 2023 PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: ubuntu-release-upgrader UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2043820/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
