Public bug reported:

uname -a
Linux L1fu510n 3.2.0-21-generic #34-Ubuntu SMP Fri Mar 30 04:25:35 UTC 2012 
x86_64 x86_64 x86_64 GNU/Linux

Running LibreOffice 1:3.5.1-1ubuntu4, Mendeley desktop 1.5 dev-4,
Nautilus 1:3.4.0-0ubuntu1

Background with (systray only):
Wallch 3.01-0ubuntu1
nautilus-dropbox 0.7.1-2
Weather Indicator 11.11.28 'Cloudy 9'
remmina 1.0.0-1ubuntu5 

Sporadically, when pausing for arbitrary times, the gnome desktop
disappears leaving all windows open with no title bar (windows are still
operational, can still be closed using the menus)

Several instances when this occurs:

"polkitd(authority=local): Unregistered Authentication Agent for unix-
session:/org/freedesktop/ConsoleKit/Session7 (system bus name :1.167,
object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale
en_US.UTF-8) (disconnected from bus)"

Coincide with the above phenomena, as shown in the auth.log below:

Apr  1 13:09:00 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by darian(uid=1000)
Apr  1 13:09:01 L1fu510n CRON[19201]: pam_unix(cron:session): session opened 
for user root by (uid=0)
Apr  1 13:09:01 L1fu510n CRON[19201]: pam_unix(cron:session): session closed 
for user root
Apr  1 13:09:21 L1fu510n sudo: pam_unix(sudo:session): session closed for user 
root
Apr  1 13:09:36 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user darian
Apr  1 13:09:37 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session7 (system bus name 
:1.167, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 13:09:40 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user lightdm by (uid=0)
Apr  1 13:09:40 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 13:09:41 L1fu510n lightdm: pam_succeed_if(lightdm:auth): requirement 
"user ingroup nopasswdlogin" not met by user "darian"
Apr  1 13:09:41 L1fu510n dbus[895]: [system] Rejected send message, 2 matched 
rules; type="method_call", sender=":1.261" (uid=104 pid=19782 
comm="/usr/lib/indicator-datetime/indicator-datetime-ser") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.34" (uid=0 pid=1496 
comm="/usr/sbin/console-kit-daemon --no-daemon ")
Apr  1 13:09:48 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user lightdm
Apr  1 13:09:48 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user darian by (uid=0)
Apr  1 13:09:48 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 13:09:53 L1fu510n dbus[895]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.2" (uid=0 pid=933 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.278" (uid=1000 pid=19918 
comm="/usr/bin/gnome-shell ")
Apr  1 13:09:53 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session24 (system bus name 
:1.279 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 13:09:56 L1fu510n gnome-keyring-daemon[19831]: unsupported key algorithm 
in certificate: 1.2.840.10045.2.1
Apr  1 13:11:03  gnome-keyring-daemon[19831]: last message repeated 9 times
Apr  1 13:11:36 L1fu510n sudo:   darian : TTY=pts/1 ; PWD=/home/darian ; 
USER=root ; COMMAND=/usr/bin/apt-get purge wallch
Apr  1 13:11:36 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by darian(uid=1000)
Apr  1 13:11:50 L1fu510n sudo: pam_unix(sudo:session): session closed for user 
root
Apr  1 13:12:33 L1fu510n sudo:   darian : TTY=pts/1 ; PWD=/home/darian ; 
USER=root ; COMMAND=/usr/bin/apt-get install wallch
Apr  1 13:12:33 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by darian(uid=1000)
Apr  1 13:12:44 L1fu510n sudo: pam_unix(sudo:session): session closed for user 
root
Apr  1 13:13:16 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session24 (system bus name 
:1.279, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 13:13:18 L1fu510n dbus[895]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.2" (uid=0 pid=933 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.291" (uid=1000 pid=21390 
comm="/usr/bin/gnome-shell ")
Apr  1 13:13:18 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session24 (system bus name 
:1.292 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 13:13:19 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session24 (system bus name 
:1.292, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 13:16:40 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user lightdm by (uid=0)
Apr  1 13:16:40 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 13:16:41 L1fu510n lightdm: pam_succeed_if(lightdm:auth): requirement 
"user ingroup nopasswdlogin" not met by user "darian"
Apr  1 13:16:41 L1fu510n dbus[857]: [system] Rejected send message, 2 matched 
rules; type="method_call", sender=":1.43" (uid=104 pid=1740 
comm="/usr/lib/indicator-datetime/indicator-datetime-ser") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.35" (uid=0 pid=1483 
comm="/usr/sbin/console-kit-daemon --no-daemon ")
Apr  1 13:17:00 L1fu510n CRON[1854]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 13:17:00 L1fu510n CRON[1854]: pam_unix(cron:session): session closed for 
user root
Apr  1 13:17:40 L1fu510n dbus[857]: [system] Rejected send message, 3 matched 
rules; type="error", sender=":1.50" (uid=104 pid=1764 comm="/usr/bin/pulseaudio 
--start --log-target=syslog ") interface="(unset)" member="(unset)" error 
name="org.freedesktop.DBus.Error.UnknownMethod" requested_reply="0" 
destination=":1.3" (uid=0 pid=903 comm="/usr/sbin/bluetoothd ")
Apr  1 13:18:33  dbus[857]: last message repeated 3 times
Apr  1 13:19:26  dbus[857]: last message repeated 2 times
Apr  1 13:19:26 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user lightdm
Apr  1 13:19:26 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user darian by (uid=0)
Apr  1 13:19:26 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 13:19:30 L1fu510n dbus[857]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.3" (uid=0 pid=903 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.70" (uid=1000 pid=2016 
comm="/usr/bin/gnome-shell ")
Apr  1 13:19:31 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name 
:1.71 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 13:19:33 L1fu510n gnome-keyring-daemon[1933]: unsupported key algorithm 
in certificate: 1.2.840.10045.2.1
Apr  1 13:20:35  gnome-keyring-daemon[1933]: last message repeated 9 times
Apr  1 13:21:03 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user darian
Apr  1 13:21:04 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name 
:1.71, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 13:21:05 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user lightdm by (uid=0)
Apr  1 13:21:05 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 13:21:06 L1fu510n lightdm: pam_succeed_if(lightdm:auth): requirement 
"user ingroup nopasswdlogin" not met by user "darian"
Apr  1 13:21:06 L1fu510n dbus[857]: [system] Rejected send message, 2 matched 
rules; type="method_call", sender=":1.86" (uid=104 pid=2525 
comm="/usr/lib/indicator-datetime/indicator-datetime-ser") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.35" (uid=0 pid=1483 
comm="/usr/sbin/console-kit-daemon --no-daemon ")
Apr  1 13:21:09 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user lightdm
Apr  1 13:21:09 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user darian by (uid=0)
Apr  1 13:21:09 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 13:21:13 L1fu510n dbus[857]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.3" (uid=0 pid=903 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.103" (uid=1000 pid=2657 
comm="/usr/bin/gnome-shell ")
Apr  1 13:21:13 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session4 (system bus name 
:1.104 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 13:21:16 L1fu510n gnome-keyring-daemon[2573]: unsupported key algorithm 
in certificate: 1.2.840.10045.2.1
Apr  1 13:22:22  gnome-keyring-daemon[2573]: last message repeated 9 times
Apr  1 13:22:22 L1fu510n sudo:   darian : TTY=unknown ; PWD=/home/darian ; 
USER=root ; COMMAND=/usr/share/apport/apport-gtk
Apr  1 13:22:22 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by (uid=1000)
Apr  1 13:22:49 L1fu510n sudo: pam_unix(sudo:session): session closed for user 
root
Apr  1 13:39:01 L1fu510n CRON[3809]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 13:39:02 L1fu510n CRON[3809]: pam_unix(cron:session): session closed for 
user root
Apr  1 14:09:01 L1fu510n CRON[4493]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 14:09:01 L1fu510n CRON[4493]: pam_unix(cron:session): session closed for 
user root
Apr  1 14:17:01 L1fu510n CRON[4524]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 14:17:01 L1fu510n CRON[4524]: pam_unix(cron:session): session closed for 
user root
Apr  1 14:39:01 L1fu510n CRON[4665]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 14:39:01 L1fu510n CRON[4665]: pam_unix(cron:session): session closed for 
user root
Apr  1 15:09:01 L1fu510n CRON[4985]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 15:09:01 L1fu510n CRON[4985]: pam_unix(cron:session): session closed for 
user root
Apr  1 15:17:01 L1fu510n CRON[5032]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 15:17:01 L1fu510n CRON[5032]: pam_unix(cron:session): session closed for 
user root
Apr  1 15:39:01 L1fu510n CRON[5307]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 15:39:01 L1fu510n CRON[5307]: pam_unix(cron:session): session closed for 
user root
Apr  1 16:09:01 L1fu510n CRON[5924]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 16:09:01 L1fu510n CRON[5924]: pam_unix(cron:session): session closed for 
user root
Apr  1 16:16:47 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session4 (system bus name 
:1.104, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 16:17:01 L1fu510n CRON[6316]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 16:17:01 L1fu510n CRON[6316]: pam_unix(cron:session): session closed for 
user root
Apr  1 16:18:06 L1fu510n login[1337]: pam_unix(login:session): session opened 
for user darian by LOGIN(uid=0)
Apr  1 16:21:06 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user darian
Apr  1 16:21:08 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user lightdm by (uid=0)
Apr  1 16:21:08 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 16:21:09 L1fu510n lightdm: pam_succeed_if(lightdm:auth): requirement 
"user ingroup nopasswdlogin" not met by user "darian"
Apr  1 16:21:10 L1fu510n dbus[857]: [system] Rejected send message, 2 matched 
rules; type="method_call", sender=":1.131" (uid=104 pid=6778 
comm="/usr/lib/indicator-datetime/indicator-datetime-ser") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.35" (uid=0 pid=1483 
comm="/usr/sbin/console-kit-daemon --no-daemon ")
Apr  1 16:21:30 L1fu510n login[1337]: pam_unix(login:session): session closed 
for user darian
Apr  1 16:21:35 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user lightdm
Apr  1 16:21:35 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user darian by (uid=0)
Apr  1 16:21:35 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 16:21:39 L1fu510n dbus[857]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.3" (uid=0 pid=903 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.153" (uid=1000 pid=6930 
comm="/usr/bin/gnome-shell ")
Apr  1 16:21:40 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session7 (system bus name 
:1.154 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 16:21:42 L1fu510n gnome-keyring-daemon[6849]: unsupported key algorithm 
in certificate: 1.2.840.10045.2.1
Apr  1 16:22:43  gnome-keyring-daemon[6849]: last message repeated 9 times
Apr  1 16:36:59 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session7 (system bus name 
:1.154, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 16:38:00 L1fu510n login[6824]: pam_unix(login:auth): check pass; user 
unknown
Apr  1 16:38:00 L1fu510n login[6824]: pam_unix(login:auth): authentication 
failure; logname=LOGIN uid=0 euid=0 tty=/dev/tty1 ruser= rhost= 
Apr  1 16:38:00 L1fu510n login[6824]: pam_winbind(login:auth): getting password 
(0x00000388)
Apr  1 16:38:00 L1fu510n login[6824]: pam_winbind(login:auth): pam_get_item 
returned a password
Apr  1 16:38:02 L1fu510n login[6824]: FAILED LOGIN (1) on '/dev/tty1' FOR 
'UNKNOWN', Authentication failure
Apr  1 16:38:04 L1fu510n login[6824]: pam_unix(login:session): session opened 
for user darian by LOGIN(uid=0)
Apr  1 16:38:10 L1fu510n sudo:   darian : TTY=tty1 ; PWD=/home/darian ; 
USER=root ; COMMAND=/bin/bash
Apr  1 16:38:10 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by darian(uid=1000)
Apr  1 16:38:46 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user lightdm by (uid=0)
Apr  1 16:38:46 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 16:38:47 L1fu510n lightdm: pam_succeed_if(lightdm:auth): requirement 
"user ingroup nopasswdlogin" not met by user "darian"
Apr  1 16:38:47 L1fu510n dbus[835]: [system] Rejected send message, 2 matched 
rules; type="method_call", sender=":1.40" (uid=104 pid=1583 
comm="/usr/lib/indicator-datetime/indicator-datetime-ser") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.34" (uid=0 pid=1423 
comm="/usr/sbin/console-kit-daemon --no-daemon ")
Apr  1 16:39:01 L1fu510n CRON[1749]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 16:39:01 L1fu510n CRON[1749]: pam_unix(cron:session): session closed for 
user root
Apr  1 16:40:05 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user lightdm
Apr  1 16:40:05 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user darian by (uid=0)
Apr  1 16:40:05 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 16:40:09 L1fu510n dbus[835]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.2" (uid=0 pid=860 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.69" (uid=1000 pid=1971 
comm="/usr/bin/gnome-shell ")
Apr  1 16:40:10 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name 
:1.70 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 16:40:12 L1fu510n gnome-keyring-daemon[1887]: unsupported key algorithm 
in certificate: 1.2.840.10045.2.1
Apr  1 16:41:12  gnome-keyring-daemon[1887]: last message repeated 9 times
Apr  1 17:09:01 L1fu510n CRON[2483]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 17:09:01 L1fu510n CRON[2483]: pam_unix(cron:session): session closed for 
user root
Apr  1 17:17:01 L1fu510n CRON[2512]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 17:17:01 L1fu510n CRON[2512]: pam_unix(cron:session): session closed for 
user root
Apr  1 17:39:01 L1fu510n CRON[2537]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 17:39:01 L1fu510n CRON[2537]: pam_unix(cron:session): session closed for 
user root
Apr  1 18:09:01 L1fu510n CRON[3311]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 18:09:01 L1fu510n CRON[3311]: pam_unix(cron:session): session closed for 
user root
Apr  1 18:17:01 L1fu510n CRON[3378]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 18:17:01 L1fu510n CRON[3378]: pam_unix(cron:session): session closed for 
user root
Apr  1 18:27:29 L1fu510n polkitd(authority=local): Unregistered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name 
:1.70, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale 
en_US.UTF-8) (disconnected from bus)
Apr  1 18:28:27 L1fu510n login[1307]: pam_unix(login:session): session opened 
for user darian by LOGIN(uid=0)
Apr  1 18:32:55 L1fu510n sudo:   darian : TTY=tty1 ; PWD=/var/log ; USER=root ; 
COMMAND=/sbin/reboot
Apr  1 18:32:55 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by darian(uid=1000)
Apr  1 18:32:55 L1fu510n sudo: pam_unix(sudo:session): session closed for user 
root
Apr  1 18:33:36 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user lightdm by (uid=0)
Apr  1 18:33:36 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 18:33:37 L1fu510n lightdm: pam_succeed_if(lightdm:auth): requirement 
"user ingroup nopasswdlogin" not met by user "darian"
Apr  1 18:33:37 L1fu510n dbus[858]: [system] Rejected send message, 2 matched 
rules; type="method_call", sender=":1.43" (uid=104 pid=1735 
comm="/usr/lib/indicator-datetime/indicator-datetime-ser") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.27" (uid=0 pid=1385 
comm="/usr/sbin/console-kit-daemon --no-daemon ")
Apr  1 18:34:09 L1fu510n lightdm: pam_unix(lightdm:session): session closed for 
user lightdm
Apr  1 18:34:09 L1fu510n lightdm: pam_unix(lightdm:session): session opened for 
user darian by (uid=0)
Apr  1 18:34:09 L1fu510n lightdm: pam_ck_connector(lightdm:session): nox11 
mode, ignoring PAM_TTY :0
Apr  1 18:34:13 L1fu510n dbus[858]: [system] Rejected send message, 2 matched 
rules; type="method_return", sender=":1.3" (uid=0 pid=900 
comm="/usr/sbin/bluetoothd ") interface="(unset)" member="(unset)" error 
name="(unset)" requested_reply="0" destination=":1.71" (uid=1000 pid=1955 
comm="/usr/bin/gnome-shell ")
Apr  1 18:34:13 L1fu510n polkitd(authority=local): Registered Authentication 
Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name 
:1.72 [/usr/bin/gnome-shell], object path 
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Apr  1 18:34:16 L1fu510n gnome-keyring-daemon[1868]: unsupported key algorithm 
in certificate: 1.2.840.10045.2.1
Apr  1 18:35:04  gnome-keyring-daemon[1868]: last message repeated 9 times
Apr  1 18:39:01 L1fu510n CRON[2585]: pam_unix(cron:session): session opened for 
user root by (uid=0)
Apr  1 18:39:01 L1fu510n CRON[2585]: pam_unix(cron:session): session closed for 
user root
Apr  1 18:39:01 L1fu510n sudo:   darian : TTY=pts/0 ; PWD=/var/log ; USER=root 
; COMMAND=/bin/bash
Apr  1 18:39:01 L1fu510n sudo: pam_unix(sudo:session): session opened for user 
root by darian(uid=1000)

** Affects: gdm (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: agent authentication gnome polkitd unregistered

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https://bugs.launchpad.net/bugs/970897

Title:
  polkitd reports "Unregistered Authentication Agent" crashing Gnome
  windowing - sporadically (?)

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