I ran Compiz from a terminal: $ compiz --replace 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: crashhandler compiz (core) - Info: Starting plugin: crashhandler 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: place compiz (core) - Info: Starting plugin: place compiz (core) - Info: Loading plugin: compiztoolbox compiz (core) - Info: Starting plugin: compiztoolbox compiz (core) - Info: Loading plugin: move compiz (core) - Info: Starting plugin: move compiz (core) - Info: Loading plugin: imgsvg compiz (core) - Info: Starting plugin: imgsvg compiz (core) - Info: Loading plugin: annotate compiz (core) - Info: Starting plugin: annotate compiz (core) - Info: Loading plugin: widget compiz (core) - Info: Starting plugin: widget compiz (core) - Info: Loading plugin: switcher compiz (core) - Info: Starting plugin: switcher compiz (core) - Info: Loading plugin: imgjpeg compiz (core) - Info: Starting plugin: imgjpeg compiz (core) - Info: Loading plugin: grid compiz (core) - Info: Starting plugin: grid compiz (core) - Info: Loading plugin: mousepoll compiz (core) - Info: Starting plugin: mousepoll compiz (core) - Info: Loading plugin: session compiz (core) - Info: Starting plugin: session 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: imgpng compiz (core) - Info: Starting plugin: imgpng compiz (core) - Info: Loading plugin: animation compiz (core) - Info: Starting plugin: animation compiz (core) - Info: Loading plugin: workarounds compiz (core) - Info: Starting plugin: workarounds compiz (core) - Info: Loading plugin: fade compiz (core) - Info: Starting plugin: fade compiz (core) - Info: Loading plugin: trailfocus compiz (core) - Info: Starting plugin: trailfocus compiz (core) - Info: Loading plugin: expo compiz (core) - Info: Starting plugin: expo compiz (core) - Info: Loading plugin: scale compiz (core) - Info: Starting plugin: scale compiz (core) - Info: Loading plugin: unityshell compiz (core) - Info: Starting plugin: unityshell WARN 2017-01-25 22:49:47 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.Shell' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:49:47 unity.debug.interface DebugDBusInterface.cpp:217 Unable to load entry point in libxpathselect: libxpathselect.so.1.4: cannot open shared object file: No such file or directory -- full D-Bus introspection will not be available WARN 2017-01-25 22:49:47 xim.controller XIMController.cpp:103 IBus natively supported. WARN 2017-01-25 22:49:47 unity.dash.gsettingsscopereader GSettingsScopes.cpp:108 Error fetching protocol metadata for scope: social.scope : Valid key file could not be found in search dirs WARN 2017-01-25 22:49:47 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Launcher' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:49:47 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Dash' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:49:47 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.SessionManager.EndSessionDialog' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:49:47 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Session' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:49:47 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.ScreenSaver' yet as we don't have a connection, waiting for it... ERROR 2017-01-25 22:49:48 unity.glib.dbus.server GLibDBusServer.cpp:538 DBus name lost 'org.gnome.Shell' ERROR 2017-01-25 22:49:48 unity.glib.dbus.server GLibDBusServer.cpp:538 DBus name lost 'com.canonical.Unity' WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it WARN 2017-01-25 22:49:48 unity.key.gnome.grabber GnomeKeyGrabber.cpp:108 Trying to grab a disabled action, we skip it I opened the CompizConfig Settings Manager: compizconfig - Info: Backend : gsettings compizconfig - Info: Integration : true compizconfig - Info: Profile : unity Loading icons... I set the Y bottom offset value in the Expo plugin from "48" to "0". Then I disable a plugin not related to Unity, say the Crash Handler: compiz (core) - Info: Stopping plugin: unityshell ERROR 2017-01-25 22:52:43 unity.shell.compiz unityshell.cpp:4025 Impossible to delete the unity locked stamp file (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed (compiz:5572): GLib-CRITICAL **: g_hash_table_remove_internal: assertion 'hash_table != NULL' failed compiz (core) - Info: Stopping plugin: scale compiz (core) - Info: Stopping plugin: expo compiz (core) - Info: Stopping plugin: trailfocus compiz (core) - Info: Stopping plugin: fade compiz (core) - Info: Stopping plugin: workarounds compiz (core) - Info: Stopping plugin: animation compiz (core) - Info: Stopping plugin: imgpng compiz (core) - Info: Stopping plugin: resize compiz (core) - Info: Stopping plugin: regex compiz (core) - Info: Stopping plugin: session compiz (core) - Info: Stopping plugin: mousepoll compiz (core) - Info: Stopping plugin: grid compiz (core) - Info: Stopping plugin: imgjpeg compiz (core) - Info: Stopping plugin: switcher compiz (core) - Info: Stopping plugin: widget compiz (core) - Info: Stopping plugin: annotate compiz (core) - Info: Stopping plugin: imgsvg compiz (core) - Info: Stopping plugin: move compiz (core) - Info: Stopping plugin: compiztoolbox compiz (core) - Info: Stopping plugin: place compiz (core) - Info: Stopping plugin: opengl compiz (core) - Info: Stopping plugin: composite compiz (core) - Info: Stopping plugin: crashhandler compiz (core) - Info: Starting plugin: composite compiz (core) - Info: Starting plugin: opengl compiz (core) - Info: Starting plugin: place compiz (core) - Info: Starting plugin: compiztoolbox compiz (core) - Info: Starting plugin: move compiz (core) - Info: Starting plugin: imgsvg compiz (core) - Info: Starting plugin: annotate compiz (core) - Info: Starting plugin: widget compiz (core) - Info: Starting plugin: switcher compiz (core) - Info: Starting plugin: imgjpeg compiz (core) - Info: Starting plugin: grid compiz (core) - Info: Starting plugin: mousepoll compiz (core) - Info: Starting plugin: session compiz (core) - Info: Starting plugin: regex compiz (core) - Info: Starting plugin: resize compiz (core) - Info: Starting plugin: imgpng compiz (core) - Info: Starting plugin: animation compiz (core) - Info: Starting plugin: workarounds compiz (core) - Info: Starting plugin: fade compiz (core) - Info: Starting plugin: trailfocus compiz (core) - Info: Starting plugin: expo compiz (core) - Info: Starting plugin: scale compiz (core) - Info: Starting plugin: unityshell ERROR 2017-01-25 22:52:43 unity.wm.compiz PluginAdapter.cpp:66 Already Initialized! WARN 2017-01-25 22:52:43 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.Shell' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:52:43 unity.debug.interface DebugDBusInterface.cpp:217 Unable to load entry point in libxpathselect: libxpathselect.so.1.4: cannot open shared object file: No such file or directory -- full D-Bus introspection will not be available WARN 2017-01-25 22:52:43 xim.controller XIMController.cpp:103 IBus natively supported. WARN 2017-01-25 22:52:43 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Launcher' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:52:44 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Dash' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:52:44 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.SessionManager.EndSessionDialog' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:52:44 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'com.canonical.Unity.Session' yet as we don't have a connection, waiting for it... WARN 2017-01-25 22:52:44 unity.glib.dbus.server GLibDBusServer.cpp:593 Can't register object 'org.gnome.ScreenSaver' yet as we don't have a connection, waiting for it... Segmentation fault (core dumped) Compiz restated outside of the terminal. I check the settings in the manager, and Expo's Y bottom offset value is back to "48". Any fix on this?