[Bug 1982183] Re: 'Authentication Error' at lock-screen after release upgrade

[Nick Rosbrook]

The lockscreen inhibitor is only active as long as the u-r-u process is.
This is probably why the issue is more apparent with the non-interactive
frontend, because it will exit silently, whereas the text frontend would
prompt the user to reboot (and many users would just accept).

IIRC the D-Bus service invalidates the inhibitor after the calling
process exits, so I don't think there is anything u-r-u can do to ensure
the inhibitor stays in place after it exits.

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1982183

Title:
  'Authentication Error' at lock-screen after release upgrade

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  After a successful do-release-upgrade from Ubuntu 20.04.4 LTS to
  Ubuntu 22.04 LTS, if the screen locks before performing a reboot, I am
  presented with an 'Authentication Error' at the lock screen and cannot
  authenticate to unlock.

  Both SSH and TTY login is still working (we use SSSD and LDAP to
  authenticate users and this still functions after the upgrade). Only
  lock-screen authentication seems to be affected.

  Rebooting the machine seems to fix this, but means any open files will
  be forcefully closed without saving.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.11
  ProcVersionSignature: Ubuntu 5.15.0-41.44~20.04.1-generic 5.15.39
  Uname: Linux 5.15.0-41-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CrashReports:
   640:8046:125:42956:2022-07-19 14:15:50.903688669 +0100:2022-07-19 14:15:51.903688669 +0100:/var/crash/_usr_share_apport_apport-gtk.8046.crash
   640:8046:125:3482736:2022-07-19 14:15:50.346358299 +0100:2022-07-19 14:15:51.346358299 +0100:/var/crash/_usr_libexec_tracker-extract.8046.crash
  Date: Tue Jul 19 14:51:26 2022
  InstallationDate: Installed on 2022-07-15 (3 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  PackageArchitecture: all
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to jammy on 2022-07-19 (0 days ago)
  VarLogDistupgradeXorgFixuplog:
   INFO:root:/usr/bin/do-release-upgrade running
   INFO:root:No xorg.conf, exiting
  modified.conffile..etc.update-manager.release-upgrades:
   [default]
     Prompt=lts
  mtime.conffile..etc.update-manager.release-upgrades: 2022-07-19T14:10:45.907460

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