could not connect to ConsoleKit: Could not get owner of name 'org.freedesktop.ConsoleKit': no such name

OS: Linux Mint 18.2 Cinnamon 64-bit (which is based on Ubuntu 16.04) In an effort to disable hibernation, I did the following with a consequence. After I have moved the following polkit file to root directory with command: sudo mv /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla / and rebooted, the shutdown menu looks as follows: As you can see for yourself, there is no actual useful button. It starts to be annoying as I started shutting down my computer at night, which I do with logout menu button and from the login screen I click on shutdown. Strange is, that after I re-created the file (I deleted it before I actually rebooted) makes no difference. A few information... ll /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla shows: -rw-r--r-- 1 root root 233 Oct 24 20:09 /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla and cat /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla outputs: [Re-enable hibernate by default] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes [Re-enable hibernate by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate ResultActive=yes I checked with another machine with the same OS, and there is absolutely the same file. I looked at the history and I am unaware, that I would do any other change than removing that one file. I am confused as to what destroyed my shutdown menu. I am unsure, what went wrong, and what should I do now to get the standard shutdown menu back? **EDIT1:** sudo tail -f /var/log/syslog revealed something: Oct 24 20:56:56 vb-nb-mint cinnamon-session: WARNING: t+2496.50307s: Could not connect to ConsoleKit: Could not get owner of name 'org.freedesktop.ConsoleKit': no such name Oct 24 20:56:56 vb-nb-mint cinnamon-session: WARNING: t+2496.50368s: Could not connect to ConsoleKit: Could not get owner of name 'org.freedesktop.ConsoleKit': no such name Oct 24 20:59:50 vb-nb-mint cinnamon-session: WARNING: t+2670.11358s: Could not connect to ConsoleKit: Could not get owner of name 'org.freedesktop.ConsoleKit': no such name Oct 24 20:59:50 vb-nb-mint cinnamon-session: WARNING: t+2670.11426s: Could not connect to ConsoleKit: Could not get owner of name 'org.freedesktop.ConsoleKit': no such name The package consolekit is installed. Maybe corrupted? apt-cache policy consolekit shows: consolekit: Installed: 0.4.6-5 Candidate: 0.4.6-5 Version table: *** 0.4.6-5 500 500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages 100 /var/lib/dpkg/status **EDIT2:** I found out, that if I run: ck-launch-session dbus-launch the standard shutdown menu appears !!! How do I make that command to run automatically with each boot? **EDIT3:** It is strange, though, that **Sleep** and Hibernate menu items are missing there. I highlight Sleep, because I would like to use it.