It doesn't work for me on my year-old thinkpad, or on my desktop, or on my server, and it is broken on two other computers I know of. Hibernation issues in Ubuntu aren't exactly an uncommon problem: https://bugs.launchpad.net/ubuntu/+source/hibernate
Additionally, it is disabled by policykit in releases past 12.04: https://bugs.launchpad.net/ubuntu/+source/policykit-desktop-...
So yeah, Hibernate is broken in Ubuntu in 2013, and your downvote doesn't change that