How to Enable Hibernate in Ubuntu 14.04 in System Tray Menu:
Hibernate is disabled by default in both upower and logind in unbuntu 14.04.
To enable hibernate, run the commands and edit the config file :
sudo -i cd /var/lib/polkit-1/localauthority/50-local.d/ gedit com.ubuntu.enable-hibernate.pkla
Note: if the config file does not open for you, try changing /var/lib to /etc in the code for looking at alternate file path.
Copy and paste below lines into the file and save it:
[Re-enable hibernate by default in upower] 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
Restart your computer and your done.
Now Hibernate option is available in System Tray.