It looks like xfce4-session is restoring a saved session without xfwm4. Please delete the content of ~/.cache/sessions/ and disable your custom startup item for xfwm4. Does xfwm4 now start automatically after login?
** Package changed: xfwm4 (Ubuntu) => xfce4-session (Ubuntu) ** Changed in: xfce4-session (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1277738 Title: all window title bars missing, xfwm4 does not start after boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-session/+bug/1277738/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs