How to Hibernate Lenovo Ideapad S10-3s Netbook

hibernatelenovoswap

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.

Update

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:

http://modifyubuntu.com/12.04/#zram

http://www.webupd8.org/2011/10/increased-performance-in-linux-with.html

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.

Related Solutions

Ubuntu – Live USB not booting in Lenovo Ideapad s10-3

There's a kernel bug specific to your Lenovo S10-3: bug #634702. It's also in the release notes:

Lenovo S10-3 systems don't boot. Temporary workaround: add "intel_idle.max_cstate=0" as a kernel paremeter at boot (634702). A fix already exists that will be available only at release time (647071).

Ubuntu – Lenovo ideapad s205 suspend/hibernate problem

Edit: Just noticed that the acer_wmi module doesn't really have much to do with your suspend problem - more than it's blocking suspend. If you find the module responsible for blocking suspend, just switch out its name with acer_wmi in the following suggestions, but without finding the responsible module, my suggestions probably aren't going to help you too much.

The traditional way of troubleshooting suspend where there's a known driver issue is to force the unloading of that module before suspend. You'd do that by running

sudoedit /etc/default/acpi-support

And looking for the MODULES="" line and changing it to (in your case):

MODULES="acer_wmi"

But reading the comments at the top of /etc/default/acpi-support, I'm not sure that's still going to work. Give it a go.

If it doesn't, you might find a short script like this fixes things:

#!/bin/sh

rmmod acer_wmi
pm-hibernate
modprobe acer_wmi

That will need to be run as root, so whereever you save it, you'll want to run it like: sudo bash ~/my-suspend-script.

I feel like there should be a good way to hack this into the /etc/pm/sleep.d/ system but I don't know enough about it to say conclusively. Perhaps something like this:

#! /bin/sh

case $1 in
     suspend|suspend_hybrid|hibernate)
        rmmod acer_wmi
        ;;
     resume|thaw)
        modprobe acer_wmi
        ;;
esac

That would be cleanest in terms of integration if editing acpi-support doesn't work.