This is the help advice in Ubuntu

My computer does not suspend or hibernate correctly

* Working with Hardware Devices
* Suspending and hibernating your computer

Some computers are unable to suspend or hibernate correctly with Ubuntu.
If this is the case for your computer, you may notice some of the
following symptoms:

*


The computer does not turn off after you click to
hibernate it.

*

When you turn the computer on after hibernating it, your
previously open programs are not restored.

*

The computer will not wake up after you have suspended it.

*

Certain programs or hardware devices stop working
correctly after resuming from hibernation or waking-up from being suspended.


If you suffer from any of these problems, you should report a bug to
Launchpad. The problems will hopefully be fixed in a subsequent version
of Ubuntu.

If your hardware does not work properly after suspending or hibernating
your computer, restart your computer and it should return to normal. If
a program does not work properly, try closing the program and then
starting it again.


You should shut open programs down before closing the lid