When you lock the desktop, there is no option to shut down, reboot, or to put the computer in hibernation mode. It is only after you unlock the desktop that you can go to the start menu and click the button for hibernation or the arrow button next to it for more options. Now, is there a way to enter hibernation mode while still viewing the lock screen?
Whenever I leave the computer unattended I usually press Win+L to lock my desktop. When I come back I enter my password and enter back into desktop. But my concern is that if I put the computer in hibernation mode to save energy, and I leave it unattended, then all it takes for anyone is to just move the mouse and they get to my desktop.
Update: I thought I would share with you what the Power Options dialog looks like on my side.
You see that there are two entries titled "Viloläge". Those are called Hibernation in English. But why do I have two of them?... I also have two of them in the two drop-down menus below this one.
Update 2: Just for future reference, this is where you start off.
Then you pick the recommended option to require a password on wake-up.
This can also be done from the Power Options dialog box, as shown by Avirk.