[Bug 1780342] Re: lock screen says "Authentication failed" after upgrade to bionic

[Launchpad Bug Tracker]

This bug was fixed in the package ubuntu-release-upgrader - 1:18.10.4

---------------
ubuntu-release-upgrader (1:18.10.4) cosmic; urgency=medium

  * DistUpgradeQuirks.py, DistUpgradeController.py: move inhibiting of
    gnome-session idle so that it is called immediately after the upgrade
    starts (LP: #1778817), present a dialog notifying that the lock screen has
    been disabled (LP: #1174093), and do not reenable the lock screen as it
    may fail to work after a release upgrade. (LP: #1780342)
  * DistUpgradeQuirks.py: Add in a quirk for upgrading to Cosmic that will
    check if the system has connectivity to the snap store and replace some
    desktop packages with snaps to ensure the system is similar to a fresh
    install.

 -- Brian Murray <brian at ubuntu.com>  Fri, 06 Jul 2018 11:21:11 -0700

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: In Progress => Fix Released

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1780342

Title:
  lock screen says "Authentication failed" after upgrade to bionic

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released

Bug description:
  After an upgrade from Ubuntu 16.04 to Ubuntu 18.04 was completed I
  left the system running and did not reboot it. Later on the lock
  screen kicked in and there was no password dialog anymore, I only saw
  "Authentication failed" and could not log into the system. Lines
  similar to the following can be found in the system's journal:

  The following lines are displayed in the journal:
  juil. 04 09:27:07 ubuntu compiz[1692]: PAM unable to dlopen(pam_unix.so): /lib/security/pam_unix.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
  juil. 04 09:27:07 ubuntu compiz[1692]: PAM adding faulty module: pam_unix.so
  juil. 04 09:27:07 ubuntu compiz[1692]: PAM unable to dlopen(pam_systemd.so): /lib/security/pam_systemd.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
  juil. 04 09:27:07 ubuntu compiz[1692]: PAM adding faulty module: pam_systemd.so

  This is because the gnome-session-inhibit call is terminated after the
  upgrade completed.

  [Test Case]
  1) Setup the lock screen on an Ubuntu 16.04 system running Unity
  2) Upgrade from 16.04 to 18.04 using do-release-upgrade or update-manager -d
  3) Do not reboot, wait for the lock screen to take effect
  4) Observe that you cannot log in anymore

  With the version of ubuntu-release-upgrader from -proposed the lock
  screen will not kick in after the upgrade.

  [Regression Potential]
  Its possible the check for Unity in XDG_CURRENT_DESKTOP is incorrect and the lock screen can still kick in.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1780342/+subscriptions