[Bug 84315] ubuntu GUI Crashed and did not restore anymore! (Not Restorable !!?)

[Solaris]

Public bug reported:

The reason is unknown weather is related to after doing online update
and installation of some application, or not.. the fact is after a few
minute the upper and lower panel frizzed. Mouse could move but its click
did not effect to any menu  or icons on both 2 panels; there was not
access to any application; killed X, restarted but after Gui login, no
panel, icons, nothing but orange background. From Command line I did not
find any command for gnome restore.

I launched terminal failsafe and run command gnome-control-center; then click to run sessions , but I received following feedback:
"**(gnome-session-properties:32023):CRITICAL **: gsm_protocol_new:assertion 'GNOME_CLIENT_CONNECTED (gnome_Client)' failed
** (gnome-session-properties:32023): WARNING **: Could not connect to gnome-session."

** Affects: malone (upstream)
     Importance: Undecided
         Status: Rejected
** Affects: gnome-session (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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ubuntu GUI Crashed and did not restore anymore! (Not Restorable !!?)
https://launchpad.net/bugs/84315