Can not change user session. System freezes

[Ángel]

Binary package hint: gdm

The problem is in Ubuntu 10.04 and 10.10. It works in 9.04 (I don't know in 9.10)

Steps:
1.- Login as user Alice
2.- I want to login as Bob without closing Alice's session:
   A) Using the "change user" option in the panel.
   B) Pressing Ctrl + Alt + F1
3.- System freezes. I can't do anything (I tried REISUB, Alt +F4, Ctrl + Alt + Fx). I have to press reboot button.

I have the problem in two different computers with new installations.

In my nephew's computer I installed 10.10 from CD deleting the old 9.04 (removing all hiding directories/files from /home/user). In 9.04 she could change user. The only new software installed is google chrome.

In my personal computer (pentium 4 2.8 Ghz, 1.5 GB Ram, gigabyte ati radeon 9250 with defaut ubuntu video driver) when I login after this error the .xsession-errors.log is:

Case 2A:
/etc/gdm/Xsession: Beginning session setup...
Setting IM through im-switch for locale=es_ES.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.
GNOME_KEYRING_CONTROL=/tmp/keyring-QhlTl6
GNOME_KEYRING_CONTROL=/tmp/keyring-QhlTl6
GNOME_KEYRING_CONTROL=/tmp/keyring-QhlTl6
SSH_AUTH_SOCK=/tmp/keyring-QhlTl6/ssh

(polkit-gnome-authentication-agent-1:1364): GLib-GObject-WARNING **: cannot register existing type `_PolkitError'

(polkit-gnome-authentication-agent-1:1364): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
** Message: applet now removed from the notification area
Unable to find a synaptics device.
Starting gtk-window-decorator
Initializing nautilus-gdu extension

(nautilus:1361): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
Nautilus-Share-Message: Called "net usershare info" but it failed: La «red compartida» devolvió el error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No existe el archivo o directorio
Please ask your system administrator to enable user sharing.

I/O warning : failed to load external entity "/home/angel/.compiz/session/10b01a81f31b2e062128948295594056700000012630026"

(nautilus:1361): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
Nautilus-Share-Message: Called "net usershare info" but it failed: La «red compartida» devolvió el error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No existe el archivo o directorio
Please ask your system administrator to enable user sharing.

Case 2B:
/etc/gdm/Xsession: Beginning session setup...
Setting IM through im-switch for locale=es_ES.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.
GNOME_KEYRING_CONTROL=/tmp/keyring-N6L0Zw
GNOME_KEYRING_CONTROL=/tmp/keyring-N6L0Zw
GNOME_KEYRING_CONTROL=/tmp/keyring-N6L0Zw
SSH_AUTH_SOCK=/tmp/keyring-N6L0Zw/ssh

(polkit-gnome-authentication-agent-1:1384): GLib-GObject-WARNING **: cannot register existing type `_PolkitError'

(polkit-gnome-authentication-agent-1:1384): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
** Message: applet now removed from the notification area
Unable to find a synaptics device.
Initializing nautilus-gdu extension
Starting gtk-window-decorator

(nautilus:1383): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
Nautilus-Share-Message: Called "net usershare info" but it failed: La «red compartida» devolvió el error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No existe el archivo o directorio
Please ask your system administrator to enable user sharing.

I/O warning : failed to load external entity "/home/angel/.compiz/session/105822a2c930dcdf5128948234447807200000012850026"

(nautilus:1383): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed

Thanks for all

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: gdm 2.30.5-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
Date: Thu Nov 11 14:52:45 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANG=es_ES.utf8
 SHELL=/bin/bash
SourcePackage: gdm

[Pedro Villavicencio (pedro)]

Thanks for the report, it has been some time without any response or feedback in this bug report and we are wondering if this is still an issue for you with the latest release of Ubuntu the Natty Narwhal, May you please test with that version and comment back if you're still having or not the issue? Please have a look at http://www.ubuntu.com/download to know how to install that version.Thanks in advance and sorry for the late response.

[Ángel (pikapikan)]

Solved in Ubuntu 11.04

[Emil Kaae Hansen (emil-kaae)]

I no longer have the issue with 11.04.

[Launchpad Janitor (janitor)]

[Expired for gdm (Ubuntu) because there has been no activity for 60 days.]