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I have tried a lot of ways but not able to solve this problem. I have to open a terminal and enter command unity. Lucky I have right click to open a command, otherwise I don't know how to post this question.

I have tried the following link solutions:

webupd8.org

omgubuntu.co.uk

Dash not working after upgrade to 13.10

Unity isn't starting on 13.10 (with Cinnamon 2.0 installed)

Ubuntu 13.10 Unity doesn't load after upgrade

ubuntuhandbook.org

However, I did a upgrade since the day ubuntu 13.10 released.And this issue just happen since yesterday.

Here is my log from unity command

compiz (core) - Info: Loading plugin: core
compiz (core) - Info: Starting plugin: core
compiz (core) - Info: Loading plugin: ccp
compiz (core) - Info: Starting plugin: ccp
compizconfig - Info: Backend     : gsettings
compizconfig - Info: Integration : true
compizconfig - Info: Profile     : unity
compiz (core) - Info: Loading plugin: composite
compiz (core) - Info: Starting plugin: composite
compiz (core) - Info: Loading plugin: opengl
compiz (core) - Info: Starting plugin: opengl
compiz (core) - Info: Loading plugin: decor
compiz (core) - Info: Starting plugin: decor
compiz (core) - Info: Loading plugin: copytex
compiz (core) - Info: Starting plugin: copytex
compiz (core) - Info: Loading plugin: vpswitch
compiz (core) - Info: Starting plugin: vpswitch
compiz (core) - Info: Loading plugin: regex
compiz (core) - Info: Starting plugin: regex
compiz (core) - Info: Loading plugin: resize
compiz (core) - Info: Starting plugin: resize
compiz (core) - Info: Loading plugin: compiztoolbox
compiz (core) - Info: Starting plugin: compiztoolbox
compiz (core) - Info: Loading plugin: imgpng
compiz (core) - Info: Starting plugin: imgpng
compiz (core) - Info: Loading plugin: snap
compiz (core) - Info: Starting plugin: snap
compiz (core) - Info: Loading plugin: commands
compiz (core) - Info: Starting plugin: commands
compiz (core) - Info: Loading plugin: mousepoll
compiz (core) - Info: Starting plugin: mousepoll
compiz (core) - Info: Loading plugin: wall
compiz (core) - Info: Starting plugin: wall
compiz (core) - Info: Loading plugin: place
compiz (core) - Info: Starting plugin: place
compiz (core) - Info: Loading plugin: gnomecompat
compiz (core) - Info: Starting plugin: gnomecompat
compiz (core) - Info: Loading plugin: unitymtgrabhandles
compiz (core) - Info: Starting plugin: unitymtgrabhandles
compiz (core) - Info: Loading plugin: animation
compiz (core) - Info: Starting plugin: animation
compiz (core) - Info: Loading plugin: grid
compiz (core) - Info: Starting plugin: grid
compiz (core) - Info: Loading plugin: move
compiz (core) - Info: Starting plugin: move
compiz (core) - Info: Loading plugin: session
compiz (core) - Info: Starting plugin: session
compiz (core) - Info: Loading plugin: fade
compiz (core) - Info: Starting plugin: fade
compiz (core) - Info: Loading plugin: expo
compiz (core) - Info: Starting plugin: expo
compiz (core) - Info: Loading plugin: workarounds
compiz (core) - Info: Starting plugin: workarounds
compiz (core) - Info: Loading plugin: scale
compiz (core) - Info: Starting plugin: scale
compiz (core) - Info: Loading plugin: ezoom
compiz (core) - Info: Starting plugin: ezoom
compiz (core) - Info: Loading plugin: unityshell
compiz (core) - Info: Starting plugin: unityshell
WARN  2013-11-21 09:31:02 unity.glib.dbus.server GLibDBusServer.cpp:586 Can't register object 'com.canonical.Autopilot.Introspection' yet as we don't have a connection, waiting for it...
WARN  2013-11-21 09:31:02 unity.glib.dbus.server GLibDBusServer.cpp:586 Can't register object 'com.canonical.Unity.Debug.Logging' yet as we don't have a connection, waiting for it...
WARN  2013-11-21 09:31:02 xim.controller XIMController.cpp:90 IBus natively supported.
WARN  2013-11-21 09:31:02 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/google-chrome.desktop' is using a deprecated format for its actions that will be dropped soon.
WARN  2013-11-21 09:31:02 unity.glib.dbus.server GLibDBusServer.cpp:586 Can't register object 'com.canonical.Unity.Launcher' yet as we don't have a connection, waiting for it...
WARN  2013-11-21 09:31:03 unity.glib.dbus.server GLibDBusServer.cpp:586 Can't register object 'com.canonical.Unity.Dash' yet as we don't have a connection, waiting for it...
WARN  2013-11-21 09:31:03 unity.glib.dbus.server GLibDBusServer.cpp:586 Can't register object 'org.gnome.SessionManager.EndSessionDialog' yet as we don't have a connection, waiting for it...
compiz (decor) - Warn: No default decoration found, placement will not be correct
compiz (decor) - Warn: No default decoration found, placement will not be correct
Created new window in existing browser session.
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 atk_object_ref_state_set: assertion 'ATK_IS_OBJECT (accessible)' failed
ERROR 2013-11-21 09:42:51 unity <unknown>:0 atk_state_set_contains_state: assertion 'ATK_IS_STATE_SET (set)' failed
ERROR 2013-11-21 09:42:51 unity.glib-gobject <unknown>:0 g_object_unref: assertion 'G_IS_OBJECT (object)' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
ERROR 2013-11-21 09:42:52 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed
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