Discussion - https://help.ubuntu.com/community/EnableHibernateWithEncryptedSwap

[jeff_themovie]

This Wiki Guide seems to be for upstart not systemd, or all ubuntu versions before 15.04.

systemd seems to try to mount the swap partition before the crypt stuff is setup and fails if the encrpyted swap is tried after crypt setup.
On an arch wiki i found the hint to make the type of the swap partition not "swap", but this did no work for me.

Encrypted swap (and hibernate) continues to work for me on Ubuntu 16.04. Granted I set it up a while ago, but that was the procedure I used.

I don't see anything upstart- or systemd-specific with those instructions... Did you set up "regular" encrypted swap (using ecryptfs-setup-swap) before starting? Did you follow the instructions exactly (especially step 8, editing /etc/crypttab)? What do you see when your computer boots?

[DarkDead]

This tutorial does not work for 16.10. I am able to hibernate my computer, but when resuming, it automatically reboots after/when copying the swap contents to RAM (after password input).
Is there any log where I can check what is going wrong? I've been scouring through /var/log/syslog, /var/log/pm-powersave.log and /var/log/pm-suspend.log and found nothing relevant.

At Hibernation with Ubuntu 16.10 fails - AskUbuntu people are pointing out that pm-utils no longer works and we should now use systemd hibernate service. Bullet 5 from crysman's answer implies that hibernation through systemd cannot handle an encrypted swap setup like the tutorial proposes.
Still, I tried adding "pci=nomsi resume=/dev/mapper/cryptswap1" to GRUB_CMDLINE_LINUX_DEFAULT and triggered hibernation with "systemctl hibernate", but the result was the same as above.

Perhaps we should dive into some alternatives:
How to use hibernation without a swap partition - Debian Wiki
dm-crypt/Swap encryption with suspend-to-disk support - Arch Wiki

Which one do you think is best?

[tworec]

Thanks for the guide. It was very helpful. There was just one extra thing I had to add in order for the passphrase prompt to always show up during start-up. In /etc/default/grub I edited GRUB_CMDLINE_LINUX_DEFAULT to look like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash cryptopts=target=cryptswap1,source=/dev/sda6 resume=swap:/dev/mapper/cryptswap1"

Similar situation here. Guide is helpful, thx, but it wasn't working until i've read this
http://chriseiffel.com/uncategorized...suming-session
[here is google copy of above page]

I've updated /etc/default/grub adding following

GRUB_CMDLINE_LINUX=”resume=/dev/sdXN other-option=value”

than

$ sudo update-grub

and now its working as a charm.

Can anyone add it to wiki page? It seems I have no permission to do that.

[amcsi2]

I have my HOME folder encrypted.

I get stuck at this step:

swapon --summary

All I get is:

Filename                Type        Size    Used    Priority
/dev/sda1                                  partition    31249404    0    -2

I'm using a swap partition, and the article seems to assume swapfiles. So I don't know how to continue.

[el_baby]

All I get is:

Filename                Type        Size    Used    Priority
/dev/sda1                                  partition    31249404    0    -2

I'm using a swap partition, and the article seems to assume swapfiles. So I don't know how to continue.

No. The article assume swap partitions, however, it assumes the swap partition is already encrypted (I don't recall 'cause I've done this too long ago, but maybe when you configure encryption during installation it encrypts the swap partition by default).

Anyway, the only thing you should do is encrypt the swap partition which is quite simple to do. Assuming /dev/sda1 is your swap partition (which is what your command shows), just type:

sudo ecryptfs-setup-swap

This will warn you that hibernate/resume will no longer work (because it will use a random generated encryption key at power-on). Go ahead, since after you finish the rest of the instructions, you should be able to hibernate/resume (assuming you remember the passphrase you'll create afterwards).

After you do this,

swapon --summary

should give you the expected output.

[ogilvierothchild]

I ran into problems after upgrading to 19.10, but eventually sorted it out.

The instructions here are close to complete, but you also must ensure the cryptsetup-initramfs package is installed (ie. run "sudo apt install cryptsetup-initramfs") prior to following the instructions in the ubuntu wiki link above.

For some reason this package was un-installed upon upgrade.

The symptoms I experienced were hangs while booting, errors on the console like "Gave up waiting for suspend/resume device", and even if you went into grub and added "noresume" on the kernel parameter lines there still might be errors, depending on initramfs configurations and kernel version.

All fixed now, just ensure cryptsetup-initramfs is installed before following the rest of it.

[deniz-dezigner]

It's better to reuse existing UUID of swap partition when mkswap:
find out UUID:

sudo blkid

copy UUID of /dev/mapper/cryptswap1, and reuse it (to avoid errors during update-initramfs):

sudo mkswap -U "YOUR-SWAP-UUID" /dev/mapper/cryptswap1

[digiworks2]

This is really very awesome