Guest session asks for a password after switching users

Bug #1022858 reported by Amr Ibrahim on 2012-07-10
This bug affects 19 people
Affects Status Importance Assigned to Milestone
lightdm (Ubuntu)

Bug Description

When I switch back to an already open guest session from my user account, I find that the guest session is locked and it asks for the Guest password (which obviously there isn't because it's a guest session!).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-session-bin 3.2.1-0ubuntu8
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Tue Jul 10 09:54:55 2012
ExecutablePath: /usr/bin/gnome-session
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
 PATH=(custom, no user)
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)
XsessionErrors: (compiz:1719): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MarkForUpload: True
Package: lightdm 1.2.1-0ubuntu1.1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 3.2.0-36.57-generic 3.2.35
Tags: precise running-unity
Uname: Linux 3.2.0-36-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo

Amr Ibrahim (amribrahim1987) wrote :
Sebastien Bacher (seb128) wrote :

Thank you for your bug report, could you log into a guess session and add your .xsession-errors from that session to the bug?

affects: gnome-session (Ubuntu) → lightdm (Ubuntu)
Changed in lightdm (Ubuntu):
importance: Undecided → Low
status: New → Incomplete
Changed in lightdm (Ubuntu):
status: Incomplete → New
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in lightdm (Ubuntu):
status: New → Confirmed

apport information

tags: added: apport-collected running-unity
description: updated

apport information

Amr Ibrahim (amribrahim1987) wrote :
Amr Ibrahim (amribrahim1987) wrote :

Is this bug going to be fixed? It's very annoying. Here is another .xsession-errors file.

Micha B (micha-ubuntu) wrote :

Workaround (if you're root, not suitable for the guest):

Switch to console (Ctrl-Alt-F1), login as user, su -, passwd guest -> choose a valid password, exit console, switch back to X (Ctrl-Alt-F7).

Givrix (geoffrey-mosini) wrote :

It still affects Trusty 14.04
I ran into this bug while switching to the guest session, back to the user and again back to the guest.
I thought I was stuck on this guest login screen as all functions are inactive on this screen, it only lets you type a password.
But it's possible to switch back to the user login screen using (ctrl-alt-f7) as the guest session is opened in a secondary X server (ctrl-alt-f8).

Givrix (geoffrey-mosini) wrote :

The user is no more guest as said by Micha B. So to unlock the guest session go to a terminal, use the command "users" to get the name of guest in the shape guest-######. Then "sudo passwd guest-######" to affect a password.

Serhiy Zahoriya (xintx-ua) wrote :

Affects Kubuntu 14.10

summary: - Guest session asks for password when switch back to it
+ Guest session asks for a password after switching users
slowtrain (pmuhl830) wrote :

Same problem in Xenial 16.04, running kernel 4.4.0-47 and also upstream kernel 4.7.10. I can get back into the guest session once without problems, but when I suspend and restart, the guest session demands a password. Trying to switch users back into guest opens a new instance of guest.

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