Public bug reported:
Upgrade from 24.04 to 26.04.1 failed when base-files' preinst aborted
because /lib32 was a dangling symlink (/usr/lib32 had been removed when
the last lib32 package was uninstalled). The upgrader said it would roll
back but then reported "upgrade complete", leaving sources on resolute,
base-files unconfigured, 1,100+ packages half-installed and GDM not
starting. Recovered via apt -f install. Suggest the upgrader pre-checks
for dangling /lib32, /lib64 or /libx32 links (or recreates the target
directory), and that a failed rollback isn't reported as success.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: ubuntu-release-upgrader-core 1:26.04.25
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports: 640:0:125:632970:2026-10-03 08:11:56.887240880 +0100:2026-10-03
09:13:00.910114332 +0100:/var/crash/base-files.0.crash
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 3 10:35:03 2026
InstallationDate: Installed on 2022-08-15 (1510 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to resolute on 2026-10-03 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade resolute wayland-session
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https://bugs.launchpad.net/bugs/2169399
Title:
Upgrade to 26.04 fails on dangling /lib32 symlink; rollback falsely
reports success
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