On Dreamlinux, from the version 2.2 RC1 that brings a the kernel 2.6.18, was added the Suspend2 function, a
funcionality equivalent to the Windows Hibernate that saves the memory Ram content to the swap partition and
turn off the machine. When you turn it on, the partition swap content is reloaded on the memory, allowing to continue
the work, withou having to reload the system. The proccess is very fast and useful, over all in notebooks, where
energy economy is an important requirement.


A required requisite – confirm before continue this tutorial – is that the swap partition must have at least
de double of phisical memory that is in your machine. If you have 256 MB of RAM, so your swap partition
must be equal or larger than 512 MB.

To use this recourse it’s necessary make a little changing on system’s files. But it is very easy.

We need to inform the Suspend2 what partition is swap. For this, type on a terminal:

cat /proc/swaps

You’re going to get a result like this:

$ cat /proc/swaps
Filename Type Size Used Priority /dev/hda2
partition 1751044 0 -1

See that in this example, the informed swap partition is the /dev/hda2

Now find the file (always as root) /sys/power/suspend2/resume:

The file is empty. Write on it /dev/hda2 ( change conform your swap partition )

Now open the file /boot/grub/menu.lst

Open it and localize the line that calls the system on the start, add after of quiet the expression
resume2=swap:/dev/hda2 as it’s showed bellow:

Ready, it’s done. Now your computer can hibernate. Restart the machine and after restart to test the function just
use the keyboard shortcut : Control+Alt+H.

Changing the configuration file of hibernate:

This proceeding is not necessary, but can be used by anyone who wants to make adjustments on hibernate process.
Find the file /etc/hibernate/common.conf. Open it as root.

You will see various lines commented or not. There’s a lot of available options to change the way your machine will start the hibernate process. Go to site http://www.suspend2.net to know more about.

For notebook users:

Notebook users could want to make use of an extra funcionality that is the possibility of when closing the case, it makes it hibernate. If you have a notebook, follow all the steps before, test the hibernation and then open the file:

/etc/default/acpi-support

and put there this content:

Now open the file: /etc/acpi/events/lm_lid

And put the content:

Finally open the file: /etc/acpi/actions/lm_lid.sh

And put this content:

That’s it, if all works fine your notebook will hibernate when you close the case.

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