Este é um bug .
Eu posso ver que existe uma pergunta já. Como meu problema é não é exatamente o mesmo, mas bastante semelhante, tanto quanto eu entendo, eu estou perguntando isso também.
Basicamente no meio do meu uso, ou seja, navegando na net ou executando um aplicativo aleatório. O Ubuntu me envia para a janela de login e eu tenho que fazer o login novamente. Eu não sei se o GDM é reiniciado ou algo mais. Este é um problema que eu enfrento mesmo na versão estável do Ubuntu.
Existe algum bug que eu não conheço ?? Como posso depurar isso?
Aqui está minha saída do arquivo ~/.xsession_errors .
/etc/gdm/Xsession: Beginning session setup...
Setting IM through im-switch for locale=en_US.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.
GNOME_KEYRING_CONTROL=/tmp/keyring-CN4XlZ
SSH_AUTH_SOCK=/tmp/keyring-CN4XlZ/ssh
GNOME_KEYRING_CONTROL=/tmp/keyring-CN4XlZ
SSH_AUTH_SOCK=/tmp/keyring-CN4XlZ/ssh
GNOME_KEYRING_CONTROL=/tmp/keyring-CN4XlZ
SSH_AUTH_SOCK=/tmp/keyring-CN4XlZ/ssh
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Initializing core options...done
Window created on XQueryTree, map state isViewable? 0
Window created on XQueryTree, map state isViewable? 0
Window created on XQueryTree, map state isViewable? 0
Window created on XQueryTree, map state isViewable? 0
Window created on XQueryTree, map state isViewable? 0
Initializing bailer options...done
Initializing detection options...done
Initializing composite options...done
Initializing opengl options...done
Initializing decor options...done
Initializing vpswitch options...done
Initializing move options...done
Initializing imgsvg options...done
Initializing expo options...done
Initializing mousepoll options...done
Initializing workarounds options...done
Initializing resize options...done
Initializing gnomecompat options...done
Initializing ezoom options...done
Initializing staticswitcher options...done
Initializing obs options...done
Initializing snap options...done
Initializing scale options...done
Initializing wall options...done
Initializing imgjpeg options...done
Initializing grid options...done
Starting Dropbox...** Message: /home/sagar/.config/desktopnova/pidlock already exists, but process with PID 1911 is not DesktopNova. Daemon will continue starting.
Initializing place options...done
Initializing commands options...done
I/O warning : failed to load external entity "/home/sagar/.compiz/session/10d8191ee2e3827d13130355181434233600000157530036"
Initializing session options...done
** (process:15832): WARNING **: recent-manager-provider.vala:125: Desktop file for audacious2 was not found
(synapse:15840): GtkHotkey-DEBUG: Listener Type: GtkHotkeyX11Listener
** (nm-applet:15829): DEBUG: old state indicates that this was not a disconnect 0
Initializing nautilus-dropbox 0.6.7
Initializing nautilus-gdu extension
Done!
** (<unknown>:15822): DEBUG: Unity accessibility initialization
** (<unknown>:15822): DEBUG: Shows on edge: 1
Screen geometry changed:
Monitor 0(primary)
0x0x1366x768
unity-panel-service: no process found
** (<unknown>:15822): DEBUG: PanelController:: Added Panel for Monitor 0
Initializing unityshell options...done
Initializing unitymtgrabhandles options...done
Starting unity-window-decorator
** (<unknown>:15822): DEBUG: PlaceEntry: Applications
** (<unknown>:15822): DEBUG: PlaceEntry: Commands
** (<unknown>:15822): DEBUG: PlaceEntry: Files & Folders
** (<unknown>:15822): DEBUG: /com/canonical/unity/applicationsplace
** (<unknown>:15822): DEBUG: /com/canonical/unity/filesplace
** (<unknown>:15822): DEBUG: Setting to primary screen rect: x=0 y=0 w=1366 h=768
** (<unknown>:15822): DEBUG: Acquired the name com.canonical.Unity.Launcher on the session bus
** (<unknown>:15822): DEBUG: TrayChild Rejected: dropbox-client-15846 dropbox Dropbox
** (<unknown>:15822): DEBUG: TrayChild Rejected: synapse synapse Synapse
** (<unknown>:15822): DEBUG: TrayChild Rejected: nm-applet nm-applet Nm-applet
** (<unknown>:15822): DEBUG: TrayChild Accepted: gnote gnote Gnote
** (<unknown>:15822): DEBUG: TrayChild Rejected: gst-keyboard-xkb gnome-settings-daemon Gnome-settings-daemon
(gnote:15839): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion 'private->update_and_descendants_freeze_count > 0' failed
** (<unknown>:15822): DEBUG: TrayChild Rejected: battery-indicator battery-status Battery-status
** (<unknown>:15822): DEBUG: IndicatorAdded: libapplication.so
** (<unknown>:15822): DEBUG: IndicatorAdded: libsoundmenu.so
** (<unknown>:15822): DEBUG: IndicatorAdded: libmessaging.so
** (<unknown>:15822): DEBUG: IndicatorAdded: libdatetime.so
** (<unknown>:15822): DEBUG: IndicatorAdded: libsession.so
Setting Update "run_key"
Setting Update "run_command_terminal_key"
Setting Update "initiate_output_edge"
Setting Update "launcher_hide_mode"
Setting Update "panel_opacity"
Setting Update "icon_size"
** (gnome-screensaver:16128): WARNING **: screensaver already running in this session
(<unknown>:15822): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
** (process:15832): DEBUG: zeitgeist-datahub.vala:174: Inserting 1 events
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: window mapped and already maximized, just undecorate
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: Guake.py window size doesn't fit
** (<unknown>:15822): WARNING **: Unable to fetch children: Method "Children" with signature "" on interface "org.ayatana.bamf.view" doesn't exist
(<unknown>:15822): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
** (process:15832): DEBUG: zeitgeist-datahub.vala:174: Inserting 1 events
loaded md5.js
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: window mapped and already maximized, just undecorate
(firefox-bin:18524): LIBDBUSMENU-GTK-CRITICAL **: dbusmenu_menuitem_property_set_shortcut: assertion 'gtk_accelerator_valid(key, modifier)' failed
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: Guake.py window size doesn't fit
(<unknown>:15822): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: Guake.py window size doesn't fit
** (process:15832): DEBUG: zeitgeist-datahub.vala:174: Inserting 1 events
15846 ? 00:00:01 dropbox
22490 ? 00:00:00 unity-dropbox-s
/usr/bin/unity-dropbox-share: line 28: return: can only 'return' from a function or sourced script
Error setting attribute: Error setting file metadata: No such file or directory
** (<unknown>:15822): DEBUG: Connected to proxy
(<unknown>:15822): dee-WARNING **: Transaction from com.canonical.Unity.FilesPlace.SectionsModel is in the past. Ignoring transaction.
(<unknown>:15822): dee-WARNING **: Transaction from com.canonical.Unity.FilesPlace.GroupsModel is in the past. Ignoring transaction.
(<unknown>:15822): dee-WARNING **: Transaction from com.canonical.Unity.FilesPlace.GlobalGroupsModel is in the past. Ignoring transaction.
** (<unknown>:15822): DEBUG: Connected to proxy
** (<unknown>:15822): DEBUG: Connected to proxy
(<unknown>:15822): GLib-GIO-CRITICAL **: g_bus_own_name: assertion 'g_dbus_is_name (name) && !g_dbus_is_unique_name (name)' failed
(<unknown>:15822): GLib-GIO-CRITICAL **: g_bus_watch_name: assertion 'g_dbus_is_name (name)' failed
(<unknown>:15822): GLib-GIO-CRITICAL **: g_bus_own_name: assertion 'g_dbus_is_name (name) && !g_dbus_is_unique_name (name)' failed
(<unknown>:15822): GLib-GIO-CRITICAL **: g_bus_watch_name: assertion 'g_dbus_is_name (name)' failed
(<unknown>:15822): GLib-GIO-CRITICAL **: g_dbus_connection_register_object: assertion 'object_path != NULL && g_variant_is_object_path (object_path)' failed
(<unknown>:15822): GLib-GIO-CRITICAL **: g_dbus_connection_register_object: assertion 'object_path != NULL && g_variant_is_object_path (object_path)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(<unknown>:15822): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(<unknown>:15822): GLib-GObject-CRITICAL **: g_signal_handler_disconnect: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: Nautilus window size doesn't fit
** (nautilus:15824): WARNING **: Invalid borders specified for theme pixmap:
/home/sagar/.themes/nautilus/null.png,
borders don't fit within the image
** (nautilus:15824): WARNING **: invalid source position for bilinear gradient
** (nautilus:15824): WARNING **: invalid source position for vertical gradient
** (nautilus:15824): WARNING **: invalid source position for horizontal gradient
** (nautilus:15824): WARNING **: Invalid borders specified for theme pixmap:
/home/sagar/.themes/nautilus/null.png,
borders don't fit within the image
** (nautilus:15824): WARNING **: invalid source position for bilinear gradient
** (nautilus:15824): WARNING **: invalid source position for vertical gradient
** (nautilus:15824): WARNING **: invalid source position for horizontal gradient
** (<unknown>:15822): DEBUG: MaximizeIfBigEnough: Guake.py window size doesn't fit
Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.
** (nautilus:15824): WARNING **: invalid source position for bilinear gradient
** (nautilus:15824): WARNING **: invalid source position for vertical gradient
** (nautilus:15824): WARNING **: invalid source position for horizontal gradient
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
(nautilus:15824): GLib-GObject-CRITICAL **: g_value_get_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
Recentemente, recebi uma atualização para as sessões do gnome. Espero que resolva o problema, no entanto só posso ter certeza depois de testar por alguns dias ... Vai atualizar a situação.
UPDATE: Não há progresso, tenho a atualização, mas o problema persiste. Mas parece ser muito menos frequente do que costumava ser. Eu estou seguindo esta questão, como algumas pessoas me sugeriram para reinstalar, mas agora eu me deparo com Unity congela após a mudança de configuração do compiz
Isso pode ser uma falha no driver de vídeo. Qual é a sua placa de vídeo? Você usa driver proprietário? Se sim, tente outra versão ou tente removê-la completamente. Ou, infelizmente, pode haver muitas outras peças de hardware. O servidor X é um colosso nas pernas de barro e mais vulnerável a falhas de hardware. Verifique sua memória (memtest86), HDD (fsck, smart), temperaturas (lm-sensors). Tente desligar todo o hardware e software desnecessários. Eu tinha visto o servidor X travar quando o EiskalDC ++ tentou indexar um arquivo de 100Gb, por exemplo. Você já leu logs, dmesg? Alguma coisa suspeita? P.S. Desligue o compiz. Está ativado por padrão no Ubuntu.
Você está usando o Unity ou o GNOME? Experimente o outro. Se isso não funcionar, sugiro Experimente o Xubuntu (para ver se é o GNOME). Se tudo isso falhar, faça backup de sua partição ou pasta, e copie / var / cache / apt para outra pasta e reinstale-a. Use os pacotes do cache para reinstalar seus aplicativos.
Tente (em um terminal, sem SUDO):
unity --reset
e depois não toque novamente no CCSM (Configurações do Compiz). Não sei se isso realmente ajuda no seu caso, mas estou na mesma situação e testando se as falhas ainda ocorrem.