Enabling Hibernate on Ubuntu 19.04 Disco Dingo

So I decided to migrate my ThinkPad X230 from Ubuntu 18.04 to the newly released Ubuntu 19.04, codenamed “Disco Dingo”. To get Disco (or any recent, SystemD-ladden Ubuntu releases) to play nice with hibernate, you need to plan ahead.

1. Prepare swap partition. In the installation process, prepare and create a swap partition as large as the system’s RAM. My X230 has 16GB and that would be the size for my swap partition. The easiest way to do this is by creating one when you install your system. On “Installation type” select “something else” to create custom partition configuration.
   
   And create a swap partition the size of the system RAM
   Or resizing your existing storage to accommodate the swap partition. As a last resort, you can opt to use a swap file
2. Check whether hibernate is supported. Do

   surfer@M5-X230:~$ cat /sys/power/state
   
   freeze mem disk

   …If disk is listed, then your system supports hibernate

3. Update grub to point to the swap partition on resume. Get the location of your swap partition:

   surfer@M5-X230:~$ grep swap /etc/fstab 
   
   # swap was on /dev/sda1 during installation
   
   UUID=14cee2ec-9d37-4ac0-b594-eae0e55814aa none swap sw 0 0

   Open /etc/default/grub

   surfer@M5-X230:~$ sudo nano /etc/default/grub

   Modify

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

   To:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID=14cee2ec-9d37-4ac0-b594-eae0e55814aa"

   Save, and update the grub config

   surfer@M5-X230:~$ sudo update-grub

   Configure the initramfs

   sudo nano /etc/initramfs-tools/conf.d/resume

   Update to:

   RESUME=UUID=14cee2ec-9d37-4ac0-b594-eae0e55814aa

4. Re-enable Hibernate menu. Update the policy kit

   sudo nano /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla

   Copy paste the following value and save the file

   [Re-enable hibernate by default in upower]
   Identity=unix-user:*
   Action=org.freedesktop.upower.hibernate
   ResultActive=yes
   
   [Re-enable hibernate by default 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

5. Configure Lid switch actions. If you want the laptop to automatically enter hibernation when you close the lid, we need to configure them here:

   sudo nano /etc/systemd/logind.conf

   The file contains several action that can be configured during login process. The one that is relevant for our purposes is:

   #HandleLidSwitch=poweroff

   Uncomment and modify it to

   HandleLidSwitch=hibernate

   Additonally, if you own a laptop dock and you would like to be able to use your laptop when it’s connected to an external monitor while the lid is closed, uncomment:

   #HandleLidSwitchDocked=ignore

   to

   HandleLidSwitchDocked=ignore

   …and save the file. Restart the systemd logind service

   surfer@M5-X230:~$ sudo systemctl restart systemd-logind.service

6. Test out hibernating. You can try hibernate your machine by doing

   surfer@M5-X230:~$ sudo systemctl hibernate