I've choosen to finish the complete systemd upgrade; so the indicator-session package is uninstalled. If i try to reinstall it, then i get:
indicator-session: Depends: systemd-services Recommends: indicator-applet but it is not going to be installed or indicator-renderer Recommends: gnome-screensaver but it is not going to be installed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1575293 Title: Remove the non-existing "systemd-services" dependency To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-session/+bug/1575293/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs