Hi there,

You may have a laptop and want put it into hibernate. Ubuntu and other OSs decided to disable this feature because it was not reliable. That is, it worked on some machines and not others. On some laptops it would not restore wireless for example. The following is from the "How to Geek" website and I acknowledge them for their work.

Here is a way to test if your computer can handle hiberate. Enter the following into your terminal and enter your administrator password when asked:

sudo pm-hibernate

Your computer will shut down and when you restart it, it should return to where you left off with all features enabled e.g. wireless. If it has worked for you then type this in terminal:

gksu gedit /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla

Then paste this into the open file:

[Enable Hibernate]
Identity=unix-user:*
Action=org.freedesktop.upower.hibernate
ResultActive=yes

Save and reboot and if your system is happy with hibernate, all should be well.