I have updated my bios. Here the result of the command you asked me to enter : 4102 09/09/2013
However, nothing changed and my unity session crashed without any warning. The system just go back the lightdm screen. Nothing change if I use GDM. The problem does not occur if I use gnome shell. Here my syslog file another time, during the crash : Nov 2 16:14:14 choupchoup org.gnome.evolution.dataserver.Sources4[1478]: server_side_source_credentials_lookup_cb: Failed to lookup password: Password not found Nov 2 16:14:14 choupchoup org.gnome.evolution.dataserver.Sources4[1478]: server_side_source_credentials_lookup_cb: Failed to lookup password: Password not found Nov 2 16:14:17 choupchoup org.a11y.atspi.Registry[1528]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":1" Nov 2 16:14:17 choupchoup org.a11y.atspi.Registry[1528]: after 183 requests (183 known processed) with 0 events remaining. Nov 2 16:14:17 choupchoup org.ayatana.bamf[1478]: (bamfdaemon:1520): Gdk-WARNING **: bamfdaemon: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (update-notifier:2107): Gdk-WARNING **: update-notifier: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (nm-applet:1772): Gdk-WARNING **: nm-applet: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (nautilus:1757): Gdk-WARNING **: nautilus: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (evolution-alarm-notify:1785): Gdk-WARNING **: evolution-alarm-notify: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup org.freedesktop.Notifications[1478]: (notify-osd:2226): Gdk-WARNING **: notify-osd: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (telepathy-indicator:2030): Gdk-WARNING **: telepathy-indicator: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (unity-fallback-mount-helper:1740): Gdk-WARNING **: unity-fallback-mount-helper: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup gnome-session[1595]: (polkit-gnome-authentication-agent-1:1739): Gdk-WARNING **: polkit-gnome-authentication-agent-1: Fatal IO error 11 (Ressource temporairement non disponible) on X server :1. Nov 2 16:14:17 choupchoup org.freedesktop.Notifications[1478]: loading icon 'notification-/usr/share/icons/gnome/32x32/status/mail-unread.png' caused error: 'L'icône « notification-/usr/share/icons/gnome/32x32/status/mail-unread.png » n'est pas présente dans le thème ubuntu-mono-dark' Nov 2 16:14:18 choupchoup org.freedesktop.Tracker1[1478]: Received signal:15->'Complété' Nov 2 16:14:18 choupchoup org.freedesktop.Tracker1[1478]: OK Nov 2 16:14:18 choupchoup gnome-session[1595]: (deja-dup-monitor:2128): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.Private.UDisks2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts Nov 2 16:14:18 choupchoup gnome-session[1595]: ** (polkit-gnome-authentication-agent-1:2238): WARNING **: Could not open X display Nov 2 16:14:18 choupchoup gnome-session[1595]: (tracker-extract:1737): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.Private.UDisks2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts Nov 2 16:14:18 choupchoup gnome-session[1595]: Received signal:15->'Complété' Nov 2 16:14:18 choupchoup gnome-session[1595]: Received signal:15->'Complété' Nov 2 16:14:18 choupchoup gnome-session[1595]: OK Nov 2 16:14:18 choupchoup gnome-session[1595]: Received signal:15->'Complété' Nov 2 16:14:18 choupchoup gnome-session[1595]: (tracker-miner-fs:1738): GVFS-RemoteVolumeMonitor-WARNING **: Owner of volume monitor org.gtk.Private.UDisks2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts Nov 2 16:14:18 choupchoup gnome-session[1595]: Received signal:15->'Complété' Nov 2 16:14:18 choupchoup gnome-session[1595]: OK Nov 2 16:14:18 choupchoup gnome-session[1595]: gnome-session[1595]: WARNING: Lost name on bus: org.gnome.SessionManager Nov 2 16:14:18 choupchoup gnome-session[1595]: gnome-session[1595]: CRITICAL: We failed, but the fail whale is dead. Sorry.... Nov 2 16:14:18 choupchoup gnome-session[1595]: WARNING: Lost name on bus: org.gnome.SessionManager Nov 2 16:14:18 choupchoup gnome-session[1595]: CRITICAL: We failed, but the fail whale is dead. Sorry.... Nov 2 16:14:18 choupchoup org.gnome.zeitgeist.SimpleIndexer[1478]: (zeitgeist-fts:2053): GLib-GIO-WARNING **: Error releasing name org.gnome.zeitgeist.SimpleIndexer: The connection is closed Nov 2 16:14:18 choupchoup org.gnome.zeitgeist.Engine[1478]: (zeitgeist-daemon:2046): GLib-GIO-WARNING **: Error releasing name org.gnome.zeitgeist.Engine: The connection is closed Nov 2 16:14:18 choupchoup org.gnome.zeitgeist.Engine[1478]: #033[31m[15:14:18.058569 WARNING]#033[0m zeitgeist-daemon.vala:449: The connection is closed Nov 2 16:14:18 choupchoup org.gnome.zeitgeist.SimpleIndexer[1478]: ** (zeitgeist-fts:2053): WARNING **: zeitgeist-fts.vala:252: The connection is closed Nov 2 16:14:18 choupchoup gnome-session[1595]: OK Nov 2 16:14:18 choupchoup systemd[1]: Stopping User Manager for UID 1000... Nov 2 16:14:18 choupchoup systemd[1359]: Stopped target Default. Nov 2 16:14:18 choupchoup systemd[1359]: Stopped target Basic System. Nov 2 16:14:18 choupchoup systemd[1359]: Stopped target Timers. Nov 2 16:14:18 choupchoup systemd[1359]: Stopped target Sockets. Nov 2 16:14:18 choupchoup systemd[1359]: Stopped target Paths. Nov 2 16:14:18 choupchoup systemd[1359]: Reached target Shutdown. Nov 2 16:14:18 choupchoup systemd[1359]: Starting Exit the Session... Nov 2 16:14:18 choupchoup systemd[1359]: Received SIGRTMIN+24 from PID 2259 (kill). Nov 2 16:14:18 choupchoup systemd[1]: Stopped User Manager for UID 1000. Nov 2 16:14:18 choupchoup systemd[1]: Removed slice user-1000.slice. Nov 2 16:14:20 choupchoup acpid: client 1370[0:0] has disconnected ** Changed in: xorg (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1511476 Title: Unstable unity session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1511476/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs