[Bug 54717] Re: No hibernate option when logging out

[Vassilis Pandis]

Are you referring to the top right icon? That's what I was referring to
in the initial bug report but apparently I wasn't clear enough. Anyway,
when going to the top right icon, cand clicking it, a panel comes up
with shutdown/restart/logout/switch user/lock screen, but no
hibernate/sleep.  (btw , I'm not even sure this belongs to gnome-
session.) I'll be happy to provide any information. Thanks.

A related bug may be bug #55399

-- 
No hibernate option when logging out 
https://launchpad.net/bugs/54717