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Setting up Hibernation in Linux Mint

Overview​

This guide explains how to enable hibernation in Linux Mint when using an encrypted LUKS LVM disk.

Prerequisites​

  • Backup your data: Modifying disk partitions can be risky. Ensure you have a backup.
  • Live CD/USB: You’ll need to boot from a Linux Mint live environment.
  • No warranty: Proceed at your own risk.

For reference, see the original guide on Ask Ubuntu.

Steps​

1. Boot from Live CD/USB​

Start your system using a Linux Mint live CD or USB.

2. Open a Terminal and Become Superuser​

sudo su

3. Verify the Encrypted Device is Locked​

Before unlocking, check that no LUKS or LVM volumes are active:

lsblk

The output should not show any crypt or lvm devices.

4. Unlock the Encrypted Device​

cryptsetup open /dev/sda4 crypt

Enter your LUKS passphrase when prompted.

5. Identify Logical Volumes​

lsblk

Example output:

└─sda4                  8:6    0 464.6G  0 part
  └─sda4_crypt        253:0    0 464.5G  0 crypt
    ├─vgmint-root     253:1    0 463.6G  0 lvm   /
    └─vgmint-swap_1   253:2    0   980M  0 lvm   [SWAP]

6. Shrink the Root Volume and Filesystem​

Reduce the root volume to free up space for swap:

lvresize --verbose --resizefs -L -32G /dev/mapper/vgmint-root
  • --resizefs: Resizes the filesystem and LV together.
  • -L -32G: Shrinks by 32 GiB.

7. Check the Root Filesystem for Errors​

e2fsck -f /dev/mapper/vgmint-root
  • -f: Forces a check even if the filesystem seems clean.

8. Increase Swap Size​

Expand the swap logical volume:

lvresize --verbose -L +32G /dev/mapper/vgmint-swap_1
  • -L +32G: Adds 32 GiB to swap.

9. Reboot into Linux Mint​

Shutdown, remove the live USB, and boot normally.

10. Resize and Reinitialize Swap​

sudo swapoff -a  
sudo cryptsetup resize vgmint-swap_1
sudo mkswap /dev/mapper/vgmint-swap_1 
sudo swapon -a

11. Update GRUB Configuration​

Edit /etc/default/grub and set:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=/dev/mapper/vgmint-swap_1"

Update GRUB after editing:

sudo update-grub

12. Enable Hibernate in the Shutdown Menu​

Create /etc/polkit-1/rules.d/10-enable-hibernate.rules with:

polkit.addRule(function(action, subject) {
    if (action.id == "org.freedesktop.login1.hibernate" ||
        action.id == "org.freedesktop.login1.hibernate-multiple-sessions" ||
        action.id == "org.freedesktop.upower.hibernate" ||
        action.id == "org.freedesktop.login1.handle-hibernate-key" ||
        action.id == "org.freedesktop.login1.hibernate-ignore-inhibit")
    {
        return polkit.Result.YES;
    }
});

13. Test Hibernation​

Try hibernating from the shutdown menu to confirm it works.

References: