i found more info in /var/crash/_usr_bin_metacity.1000.crash:
Title: metacity crashed with SIGABRT in raise()
UnreportableReason: The program crashed on an assertion failure, but the message could not be retrieved. Apport does not support reporting these crashes.
XsessionErrors:
(polkit-gnome-authentication-agent-1:1132): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
i found more info in /var/crash/ _usr_bin_ metacity. 1000.crash:
Title: metacity crashed with SIGABRT in raise() gnome-authentic ation-agent- 1:1132) : GLib-CRITICAL **: g_once_init_leave: assertion `initialization _value != 0' failed
UnreportableReason: The program crashed on an assertion failure, but the message could not be retrieved. Apport does not support reporting these crashes.
XsessionErrors:
(polkit-