PopOS BTRFS LUKS encrypted swap hibernation

hibernate.md

Originally from: wmutschl/mutschler.eu#13 (comment)

1. Create a LUKS partition for swap with the same password as cryptdata:

cryptsetup luksFormat /dev/nvme0n1p4

Ensure swap partition shows as linux-swap in gparted. If not, open gparted and decrypt the swap drive and then reformat as swap again.

If it has a new LUKS UUID, make sure to update in the /etc/crypttab, then close encryption on gparted in order to remount to the proper location that cryptswap is expecting.

cryptsetup luksOpen /dev/nvme0n1p4 /dev/mapper/cryptswap
swapon -a 

2. Change /etc/crypttab to look like this:

cryptdata UUID=something-something none luks,discard,keyscript=decrypt_keyctl
cryptswap UUID=bla-bla-bla none luks,discard,swap,tries=1,keyscript=decrypt_keyctl

3. Add "resume=/dev/mapper/cryptswap" as a kernel flag:

sudo kernelstub -a "resume=/dev/mapper/cryptswap"

(or manually add it to the "user" section of /etc/kernelstub/configuration)

4. Add line RESUME=/dev/mapper/cryptswap to /etc/initramfs-tools/conf.d/resume, or replace RESUME line if it exists.

5. Update initramfs:

update-initramfs -c -k all

popos-gui-hibernate-extension.md

From https://support.system76.com/articles/enable-hibernation/

Add Extension:

To add Hibernate and Hybrid Sleep to the power menu, we'll need to add this GNOME-Shell extension: Hibernate Status Button

Add .pkla file:

NOTE: Pop!OS and Ubuntu require a file at /etc/polkit-1/localauthority/10-vendor.d/com.ubuntu.desktop.pkla

To create this file, run:

sudo nano /etc/polkit-1/localauthority/10-vendor.d/com.ubuntu.pkla

Then copy these contents into the newly created file:

[Enable hibernate in upower]
Identity=unix-user:*
Action=org.freedesktop.upower.hibernate
ResultActive=yes

[Enable hibernate in logind]
Identity=unix-user:*
Action=org.freedesktop.login1.hibernate;org.freedesktop.login1.handle-hibernate-key;org.freedesktop.login1;org.freedesktop.login1.hibernate-multiple-sessions;org.freedesktop.login1.hibernate-ignore-inhibit
ResultActive=yes

Save (ctrl+s) and close the file (ctrl+x).

On your next boot, you should now have an Hibernate option in the top-right, drop-down, Power Off / Logout Options menu. The Hibernate option is located alongside the existing Suspend and Power Off options.