Public bug reported:
# Context
* Computer with several X sessions opened.
* Users switching from one opened session to another.
* Lightdm opens new greeter, wait for typing password.
* User types password.
* Password is accepted.
* System closes the current greeter (screen gets black for an instant).
# Expected
* User gets back to their already opened session.
# Observed
* System immediately opens another greeter.
* User has to type password again.
# Reproducible
* Not always. At times, often, at other times, rare.
# Additional information
Users switch session via
dm-tool switch-to-user $OTHERUSER
but I guess bug appears with other means (like menu item like "lock screen",
etc).
# Information requested
lsb_release -rd
Description: Ubuntu 18.04 LTS
Release: 18.04
LC_ALL=C apt-cache policy lightdm
lightdm:
Installed: 1.26.0-0ubuntu1
Candidate: 1.26.0-0ubuntu1
Version table:
*** 1.26.0-0ubuntu1 500
500 http://fr.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: lightdm 1.26.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Tue Jun 12 14:14:52 2018
ExecutablePath: /usr/sbin/lightdm
InstallationDate: Installed on 2018-05-25 (18 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
LANG=fr_FR.UTF-8
PATH=(custom, no user)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.logrotate.d.lightdm: [modified]
mtime.conffile..etc.logrotate.d.lightdm: 2018-05-25T06:19:22.081830
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1776475
Title:
Unlocking existing session often requires several attempts.
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