Disclaimer

Hibernation is not officially supported on Pop!_OS as of 22.04. This documentation is supplied for your own explorative purposes. Any changes to your system configuration may break hibernation, or hibernation may not work at all. Support or assistance may not be provided.

State of Hibernation on Pop!_OS

Hibernation is not currently enabled on Pop!_OS by default. There are several limitations that keep this from being a default:

• Pop!_OS' Default Partition Layout
• Use of a non-persistent encryption key for SWAP.
• Additional drive I/O used on Solid State Drives (SSDs)
• Depending on alloted RAM in a system, and size of NVMe/SSD drive(s), hibernation could add notable delay on resuming a hibernation session.

However, these limitations aside, hibernation is an often requested feature for Pop!_OS. The purpose of this article is to provide steps for enabling hibernation for any users that would like it. Since hibernation completely shuts off power to the device, it can prolong the lifetime of your battery. Additionally, there are some security benefits. Unlike suspend, the decryption key for the disk no longer remains in memory, and the disk is locked. This mitigates certain physical attacks that can extract the key from RAM.

Enable Hibernation on an Encrypted Drive

1. Boot into Pop!_OS Recovery

   Turn your computer off, then turn it back on and hold down the SPACE bar immediately. In the menu that appears, select PopOS Recovery, and let it boot.

   Once it boots, close out of the installation window or choose Try Demo Mode (be sure not to choose any install or repair options, as this could result in data loss. It will also mount the drive and make the next steps harder).

2. Open Gparted by clicking Activities/Applications and searching for "Gparted" or by pressing SUPER+T to open a Terminal, and running:

   gparted
   

3. Disable and remove the SWAP partition. You can either right-click on the SWAP partition, and select swapoff or issue that same command in the Terminal:

   sudo swapoff
   

   Then click on the swap partition, click the red X to mark it for deletion, and then press the green check-mark to approve the changes.

4. Extend the luks partition to the end of the drive.

   Click on the encrypted luks partition and select the "Resize/Move" button. Use the GUI drag tools, or number fields, to make sure the OS partition extends to the end of the drive (after EFI and recovery). Use the green check-mark to apply the changes to the drive and close gparted once the changes are complete.

   

   Open the encrypted partition using these Terminal commands:

   SATA Drives	NVMe Drives
   sudo cryptsetup luksOpen /dev/sda3 cryptdata	sudo cryptsetup luksOpen /dev/nvme0n1p3 cryptdata

   NOTE: In the screenshot example, the partition is called /dev/vda3. Adjust the drive name to your case (sda# or nvme#n#p#).

   sudo lvscan
   sudo vgchange -ay
   

5. Reduce the size of the root volume by the size of main memory. If you have 16GB of memory, reduce the data-root volume by 16GB. If you have 32GB, reduce by 32GB, etc. Use these Terminal commands:

   free -h
   sudo lvreduce -r -L -16G /dev/mapper/data-root
   

6. Create a swap volume (instead of a drive partition):

   sudo lvcreate -L 16G --alloc contiguous --name swap data
   sudo mkswap /dev/data/swap
   

7. Mount the root filesystem and edit crypttab and fstab to update for the new swap location:

   Mount the data-root volume:

   sudo mount /dev/mapper/data-root /mnt
   

   Edit crypttab to remove the original swap partition entry.

   sudo nano /mnt/etc/crypttab
   

   

   Open fstab to update the mount path for the new swap volume.

   # swap mount line will be changed to
   # /dev/mapper/data-swap none swap defaults 0 0
   sudo nano /mnt/etc/fstab
   

   

8. Reboot your computer and allow it to load Pop!_OS normally. Check that the swap partition in use and is sized for your system memory by running the following command in a terminal:

   free
   

9. Add a resume target for the kernel:

   Using the UUID for the data-swap partition run this command:

   sudo blkid
   # use the UUID for the /dev/mappter/data-swap line from the output of blkid
   sudo kernelstub -a "resume=UUID=xxxxxxxx-xxxx-xxxx-xxxxxxxx"
   

   NOTE: Replace everything after UUID= with the ID of your new swap volume.

   

   The system should now be ready to suspend to, and resume from disk.

   You can test if hibernation works by booting back into your install and running:

   sudo systemctl hibernate
   

   CAUTION: Hibernation, if used often, will add additional write traffic (equal to the total amount of RAM) to SSDs, shortening the lifespan of the drives.

Desktop Integration - GNOME Extension

1. Add Extension:

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

2. 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.