está bem já corrigido pela remoção de apport, update-manager e update-manager-core e btw eu recebo a solução de aqui
$ sudo apt-get remove apport update-manager update-manager-core
agora meu openbox funciona sem problemas
eu recebi esse erro no meu log, ele mantém o logout automaticamente
já reinstalado openbox, mas isso ainda acontece
btw eu estou executando o Ubuntu 12.04
ERROR: apport (pid 26391) Sun Mar 2 20:57:36 2014: gdbus call error: Error: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
ERROR: apport (pid 26391) Sun Mar 2 20:57:36 2014: debug: session gdbus call:
ERROR: apport (pid 26391) Sun Mar 2 20:57:36 2014: this executable already crashed 2 times, ignoring
ERROR: apport (pid 28921) Sun Mar 2 20:59:46 2014: called for pid 26598, signal 6
ERROR: apport (pid 28921) Sun Mar 2 20:59:46 2014: executable: /usr/bin/openbox (command line "/usr/bin/openbox --startup /usr/lib/openbox/openbox-autostart\ OPENBOX")
ERROR: apport (pid 28921) Sun Mar 2 20:59:46 2014: gdbus call error: Error: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
ERROR: apport (pid 28921) Sun Mar 2 20:59:46 2014: debug: session gdbus call:
ERROR: apport (pid 28921) Sun Mar 2 20:59:46 2014: this executable already crashed 2 times, ignoring
corrigido removendo o apport update-manager e update-manager-core