On Ubuntu too. I use a swap daemon to manage dynamic swap, and no swpafile as such. So I do not get the Hibernate option. I had set it to Hibernate On Low Battery when I had swap, now it reports "unable to hibernate".
I did have a problem with hibernation on a fresh install of Ubuntu, even then I used a 6 GB swap partition for my 4 GB RAM. Only after a few updates did it get smoothed out. Regards, Chhatoi Pritam Baral -- LUG@IITD - http://lug-iitd.org/Footer
