(gnome-settings-daemon:2860): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed

(gnome-settings-daemon:2860): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
Window manager warning: Failed to read saved session file /var/lib/gdm/.config/metacity/sessions/105250d4ad2dd2803125161785554367200000027980008.ms: Failed to open file '/var/lib/gdm/.config/metacity/sessions/105250d4ad2dd2803125161785554367200000027980008.ms': No such file or directory
gnome-session[2798]: WARNING: Could not launch application 'polkit-gnome-authentication-agent-1.desktop': Unable to start application: Failed to execute child process "/usr/libexec/polkit-gnome-authentication-agent-1" (No such file or directory)
** (process:2898): DEBUG: Greeter session pid=2898 display=:0.0 xauthority=/var/run/gdm/auth-for-gdm-1TGQwu/database
gdm-simple-greeter[2898]: DEBUG(+): Enabling debugging
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 1: signum=4 (nil)
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 4 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 2: signum=7 (nil)
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 7 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 3: signum=11 (nil)
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 11 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 4: signum=6 (nil)
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 6 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 5: signum=5 (nil)
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 5 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 6: signum=15 0x4103b0
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 15 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 7: signum=2 0x4103b0
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 2 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 8: signum=8 0x4103b0
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 8 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 9: signum=1 0x4103b0
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 1 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Adding handler 10: signum=10 0x4103b0
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Registering for 10 signals
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: connecting to address: unix:abstract=/tmp/gdm-greeter-JZfUzimf,guid=1b2025997f57fb426e33725b4a9a2c3d
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Calling GetDisplayId
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Creating proxy for /org/gnome/DisplayManager/Display1
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterPanel: activating default layout
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: Starting a login window local:1
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: no rows selected
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: selection cleared
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: grabbing focus
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: not grabbing focus - not realized
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: font height 17; using icon size 51
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: font height 17; using icon size 51
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: Got greeter logo 'computer'
gdm-simple-greeter[2898]: WARNING: Could not ask power manager if user can suspend: The name org.freedesktop.PowerManagement was not provided by any .service files
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: banner message disabled
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: grabbing focus
gdm-simple-greeter[2898]: DEBUG(+): Client registered with session manager: /org/gnome/SessionManager/Client3
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: obj_path=/org/gnome/DisplayManager/GreeterServer interface=org.gnome.DisplayManager.GreeterServer method=Ready
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Ready
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: Ready
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: Resetting dialog
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: setting active item '(null)'
gdm-simple-greeter[2898]: WARNING: Could not ask power manager if user can suspend: The name org.freedesktop.PowerManagement was not provided by any .service files
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: banner message disabled
Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x1200021 (Login Wind)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.
Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x1200021 (Login Wind)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: grabbing focus
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: skipping shell /bin/false
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: Found current seat: /org/freedesktop/ConsoleKit/Seat1
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: running 'ck-history --frequent --seat='Seat1' --session-type='''
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: explicitly skipping user: nobody
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: user icon changed
gdm-simple-greeter[2898]: DEBUG(+): adding monitor for '/home/neil/.face'
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: user icon changed
gdm-simple-greeter[2898]: DEBUG(+): adding monitor for '/home/sarah/.face'
gdm-simple-greeter[2898]: DEBUG(+): Getting list of sessions for user 1001
gdm-simple-greeter[2898]: DEBUG(+): Found 0 sessions for user sarah
gdm-simple-greeter[2898]: DEBUG(+): Getting list of sessions for user 1000
gdm-simple-greeter[2898]: DEBUG(+): Found 0 sessions for user neil
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: history output: neil     153

gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: User login frequency changed: neil
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: history output: root     79

gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: excluding user 'root'
gdm-simple-greeter[2898]: DEBUG(+): GdmUserManager: history output: sarah    4

gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: User login frequency changed: sarah
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: Users loaded
gdm-simple-greeter[2898]: DEBUG(+): Login freq 1=4 2=153
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: font height 17; using icon size 51
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: User added name:neil logged-in:0 pixbuf:0x285e230
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: selection change to list path '0'
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: banner message disabled
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: selection change to list path '1'
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: banner message disabled
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: font height 17; using icon size 51
gdm-simple-greeter[2898]: DEBUG(+): GdmUserChooserWidget: User added name:sarah logged-in:0 pixbuf:0x285e230
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: selection change to list path '2'
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: banner message disabled
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: grabbing focus
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: users loaded
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: banner message disabled
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: attempting to activate single item
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: unable to activate single item - has 3 items
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: selection change to list path '2'
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: row activated '0'
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: will emit activated after resize
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: clearing selection
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: no rows selected
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: selection cleared
gdm-simple-greeter[2898]: DEBUG(+): GdmChooserWidget: shrink complete
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: user chosen 'neil'
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Calling SelectUser
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Calling BeginVerificationForUser
gdm-simple-greeter[2898]: WARNING: Could not ask power manager if user can suspend: The name org.freedesktop.PowerManagement was not provided by any .service files
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: obj_path=/org/gnome/DisplayManager/GreeterServer interface=org.gnome.DisplayManager.GreeterServer method=DefaultLanguageNameChanged
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Received DefaultLanguageNameChanged (en_GB.UTF-8)
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: default language name changed: en_GB.UTF-8
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: obj_path=/org/gnome/DisplayManager/GreeterServer interface=org.gnome.DisplayManager.GreeterServer method=DefaultLayoutNameChanged
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Received DefaultLayoutNameChanged (gb)
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: default layout name changed: gb
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterPanel: activating layout: gb
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: obj_path=/org/gnome/DisplayManager/GreeterServer interface=org.gnome.DisplayManager.GreeterServer method=DefaultSessionNameChanged
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Received DefaultSessionNameChanged (gnome)
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: default session name changed: gnome
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: obj_path=/org/gnome/DisplayManager/GreeterServer interface=org.gnome.DisplayManager.GreeterServer method=SecretInfoQuery
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Received SecretInfoQuery (Password: )
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: Secret info query: Password: 
Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x1200021 (Login Wind)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Calling AnswerQuery
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: obj_path=/org/gnome/DisplayManager/GreeterServer interface=org.gnome.DisplayManager.GreeterServer method=UserAuthorized
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterSession: user authorized
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: user now authorized
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterLoginWindow: starting session
gdm-simple-greeter[2898]: DEBUG(+): GdmGreeterClient: Calling StartSessionWhenReady
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: handling signal 15
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Found 1 callbacks
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: running 15 handler: 0x4103b0
gdm-simple-greeter[2898]: DEBUG(+): Got callback for signal 15
gdm-simple-greeter[2898]: DEBUG(+): Caught signal 15, shutting down normally.
gdm-simple-greeter[2898]: DEBUG(+): GdmSignalHandler: Caught termination signal - exiting
Window manager warning: CurrentTime used to choose focus window; focus window may not be correct.
Window manager warning: Got a request to focus the no_focus_window with a timestamp of 0.  This shouldn't happen!