What Ubuntu version do you have?

How are you putting it into Hibernate?

What kind of computer do you have?

In particular, are you using an nVidia graphics card?

What restricted drivers are loaded?

Hibernate and Suspend are now working on my
laptops running 8.04. Is the new kernel included
in these new release that makes it to work. It does not
work flawlessly but at least it comes back to life.
The wireless does not come back to life automatically,
which is fixed by taking the PCMCIA card out and then
back in, followed by restarting the network interface
(ifdown and ifup).

This problem has been one of the most difficult to
fix and overcome on linux distributions. We are getting
there...hang on!

Many distros have this problem. There isn't a quick fix as far as I can tell
from reading forums. Time will straighten it out, but most of us want a fix now.
My eeePC has the problem with Ubuntu and other distros. My desktop computer does
not have the problem, but then again I don't need it because I don't need to
save the battery. Go figure.

The eeePC default distro (Xandros) does not have a problem. I found some scripts
that worked with Gutsy, but none for Hardy, yet. The script with Gutsy did some
patches. Not being a programmer I don't know what it patched, but it worked.