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I tried reactivating the hibernate option when it was disabled, i tested sudo pm-hibernate and it was ok, but after that when i hibernate this appears "not enough free swap". so i would like to disable the hibernate option again. help!

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Maybe [this][1] can help? [1]:… – Jorge M. Treviño May 7 '12 at 19:00

Better yet, if you want to enable a functional hibernate menu entry, you must first make sure you have a large enough swap partition and that it is correctly assigned to Ubuntu 12.04. Only then you should enble hibernate through a simple modification of the /var/lib/polkit-1/localauthority/10-vendor.d/com.ubuntu.desktop.pkla file.

Run GParted and check the size of your swap partition, assuming there's one. It should be larger than your physical RAM. i.e. I had the same problem as I didn't provide a swap partition when I installed assuming my RAM was sufficient. I have 6GB RAM so I had to create a 12GB swap partition.

I did it after the install, so Ubuntu didn't automatically recognized and I had to assign it following this instructions:

Then, from the same site, I followed the instructions to enable it for hibernation and resume, modifying my Grub config file and created another called initramfs.

Lastly, I followed the instructions here to place a Hibernate entry in the system menu.

Hibernate missing from power menu and when I press laptop power button

Actually, I did the very last step first and the hibernation process was spotty until I enlarged the swap to double the RAM (started with basically the same amount as RAM) and went through the steps described in the first step.

For me it was a bit involved because I had to go trial & error to troubleshoot the process but you should have no problem by going in the order suggested above.

Let us know how it went.

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