I installed Oneiric and then updated it. So I rebooted my netbook, Samsung n150.
After logging in, I clicked the power cog. I was surprised to see that "Hibernate" and "Suspend" were gone.
When I clicked on "Shut down", it didn't shut down. Instead, it logged me out.
To turn off the netbook, I had to go into the terminal and execute
What can I do to restore the functionality of the menu?