I can also happily confirm that the solution above works for me! Is there some other power manager built into CInnamon that I am missing? If not, there needs to be, as 99% of users would never be able to solve this on their own or by trial and error. Thank you SOOO much for this!
I had been reluctant to use CInnamon solely due to the fact that it would hibernate when I closed the laptop's lid, as my Toshitba Satellite L775D will not resume correctly when told by Mint to sleep/hibernate. As a result of this I have been trying to use MATE (which presents me with sound and volume issues), and trying out Mint Maya with KDE. Now I think I might be able to stick with LMDE and CInnamon, which is what I would rather do. Of course I was perfectly happy with Gnome 2, but that is beside the point now.