When I upgraded from 11.10 to 12.04 my Ubuntu power menu has lost the ability to hibernate. Is there a way to add that back in, or is this default for 12.04?
Ubuntu – Hibernate missing from power menu and when I press laptop power button
12.04hibernate
Related Solutions
Open a terminal and run the following command:
gksu gedit /usr/share/polkit-1/actions/org.freedesktop.upower.policyThis opens up
/usr/share/polkit-1/actions/org.freedesktop.upower.policyfor editing.In the
org.freedesktop.upower.hibernatesection, changed the the line<allow_active>yes</allow_active>to<allow_active>no</allow_active>:
Restart
indicator-session-serviceso for the change to take effect:killall indicator-session-service
That's it, there should no longer be a Hibernate item in the session menu.
I don't know the answer to the specific question you asked, but you can set the computer to automatically suspend after a set idle time:
Open "System Settings" from the power/gear menu (top right in Unity).
Click "Power"
Choose a suitable timeout.
Suspend isn't quite the same as hibernate, and there's no manual "do it now" feature, but it'll still save you power.
(Alternatively, you could log yourself in, and suspend it from your own session. Your SO would have to switch back to her own session when she returns.)
Best Answer
Hibernation is disabled by default in Ubuntu 12.04. A rationale of this decision can be found in this bug report.
See this question to reenable it: