I have the same problem, but "fixed" it. The temporary solution is to enable metacity via "/usr/share/gnome-session/sessions/gnome-classic.session" Note the DefaultProvider-windowmanager is chnaged to metacity
[GNOME Session] Name=GNOME Classic RequiredComponents=gnome-panel;gnome-settings-daemon; RequiredProviders=windowmanager; DefaultProvider-windowmanager=metacity DefaultProvider-notifications=notify-osd Required-filemanager=nautilus IsRunnableHelper=/usr/lib/gnome-session/gnome-session-check-accelerated FallbackSession=gnome-fallback DesktopName=GNOME -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/973559 Title: gtk-window-decorator is exiting immediately (or crashing?) To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/973559/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp