Ubuntu – How to make Lenovo Ideapad S10-3s netbook hibernate


My Lenovo Ideapad S10-3s, which is using Ubuntu 12.04 LTS, does not hibernate. The error message shown is PM: Not enough free swap, although my swap is around 3GB and my RAM only around 1GB.

How can I make it hibernate? I have already tried doing this How to enable hibernation? to enable my hibernation.


This is the screenshot after I used the swapon -s command suggest in neon_overload's answer:

image of swapon -s result

2nd Update

I solved this problem by installing zramswap-enabler from:




After I installed zramswap-installer and rebooted my netbook, it is able to hibernate.

The screenshot of swapon -s after I installed zramswap-enabler:
image of swapon -s result

Best Answer

  • swapon -s will display how much swap you actually have mounted at the moment.

    It is possible that you have a 3GB swap partition but for some reason it isn't being mounted. It'll also tell you if there is anything abnormal about your swap usage. If you continue to have problems, tell us the output of this command.

    The swap partition is mounted in /etc/fstab (typically).

    Another thing to keep in mind is that if you selected to encrypt your home directory during the Ubuntu install, your swap partition will also, by default, be encrypted. Due to the way this is done it's no longer possible to hibernate (it would be difficult to have disk encryption but also allow hibernation and still be secure, and Ubuntu's chosen method of home directory encryption does not support it).

    Edit: as seen in the comments, it became apparent that this user had both zRam-based swap (which is like compcache) and disk-based swap, and solved his/her problem by installing zramswap-enabler.

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