I am using Ubuntu 11.10 with latest updates. From last Two Week, When I try to Shutdown Ubuntu,some times my PC freeze with Ubuntu Normal Shutdown Screen and shutdown by pressing power button on CPU. After restart the ubuntu I check the syslog, the last entries in problem session seen as below:-
Feb 19 19:45:41 ubu dbus[582]: [system] Activating service name='org.freedesktop.Accounts' (using servicehelper)
Feb 19 19:45:41 ubu dbus[582]: [system] Successfully activated service 'org.freedesktop.Accounts'
Feb 19 19:45:41 ubu accounts-daemon[986]: started daemon version 0.6.14
Feb 19 19:45:41 ubu anacron[995]: Anacron 2.3 started on 2012-02-19
Feb 19 19:45:41 ubu anacron[995]: Normal exit (0 jobs run)
Feb 19 19:45:41 ubu kernel: [ 20.873895] ppdev: user-space parallel port driver
Feb 19 19:45:41 ubu dbus[582]: [system] Activating service name='org.freedesktop.ColorManager' (using servicehelper)
Feb 19 19:45:41 ubu dbus[582]: [system] Successfully activated service 'org.freedesktop.ColorManager'
Feb 19 19:45:42 ubu dbus[582]: [system] Activating service name='org.freedesktop.ConsoleKit' (using servicehelper)
Feb 19 19:45:42 ubu dbus[582]: [system] Successfully activated service 'org.freedesktop.ConsoleKit'
Feb 19 19:45:43 ubu dbus[582]: [system] Activating service name='org.freedesktop.UPower' (using servicehelper)
Feb 19 19:45:43 ubu dbus[582]: [system] Successfully activated service 'org.freedesktop.UPower'
Feb 19 19:45:43 ubu dbus[582]: [system] Activating service name='org.freedesktop.RealtimeKit1' (using servicehelper)
Feb 19 19:45:43 ubu dbus[582]: [system] Successfully activated service 'org.freedesktop.RealtimeKit1'
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Successfully called chroot.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Successfully dropped privileges.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Successfully limited resources.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Running.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Watchdog thread running.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Canary thread running.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Successfully made thread 1218 of process 1218 (n/a) owned by '1000' high priority at nice level -11.
Feb 19 14:15:43 ubu rtkit-daemon[1220]: Supervising 1 threads of 1 processes of 1 users.
Feb 19 14:15:44 ubu rtkit-daemon[1220]: Successfully made thread 1224 of process 1218 (n/a) owned by '1000' RT at priority 5.
Feb 19 14:15:44 ubu rtkit-daemon[1220]: Supervising 2 threads of 1 processes of 1 users.
Feb 19 14:15:44 ubu rtkit-daemon[1220]: Successfully made thread 1225 of process 1218 (n/a) owned by '1000' RT at priority 5.
Feb 19 14:15:44 ubu rtkit-daemon[1220]: Supervising 3 threads of 1 processes of 1 users.
Feb 19 19:45:44 ubu pulseaudio[1218]: [pulseaudio] bluetooth-util.c: Error from RegisterEndpoint reply: org.freedesktop.DBus.Error.UnknownMethod
Feb 19 19:45:44 pulseaudio[1218]: last message repeated 2 times
Feb 19 19:45:44 ubu udev-configure-printer: add /module/lp
Feb 19 19:45:44 ubu udev-configure-printer: Failed to get parent
Feb 19 19:45:44 ubu dbus[582]: [system] Activating service name='org.freedesktop.UDisks' (using servicehelper)
Feb 19 19:45:44 ubu dbus[582]: [system] Successfully activated service 'org.freedesktop.UDisks'
Feb 19 19:45:45 ubu kernel: [ 24.846105] EXT4-fs (sda3): re-mounted. Opts: errors=remount-ro,commit=0
Feb 19 19:45:46 ubu kernel: [ 25.565376] init: plymouth-stop pre-start process (1338) terminated with status 1
Feb 19 19:45:54 ubu kernel: [ 34.004532] init: tty4 main process (822) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.004838] init: tty5 main process (827) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.005119] init: tty2 main process (844) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.005421] init: tty3 main process (845) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.005726] init: tty6 main process (847) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.006287] init: irqbalance main process (873) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.006561] init: cron main process (893) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.007338] init: tty1 main process (1339) killed by TERM signal
Feb 19 19:45:54 ubu kernel: [ 34.010115] init: plymouth-upstart-bridge main process (1416) terminated with status 1
Feb 19 19:45:54 ubu kernel: Kernel logging (proc) stopped.
Feb 19 19:45:54 ubu rsyslogd: [origin software="rsyslogd" swVersion="5.8.1" x-pid="574" x-info="http://www.rsyslog.com"] exiting on signal 15.
I give "sudo shutdown now" command in terminal but the screen freeze with the message
*Disabling powe rmanagement...... Then I give "sudo poweroff" command
this time system shutdown correctly
How can solve my problem?
