Krdytkyu

When I use the command sudo systemctl hibernate, the system seems to go to hibernation, but when restarted, it is a fresh start without any of the previous windows that were left open.

And when I tried sudo pm-hibernate it says sudo: pm-hibernate: command not found.

Here is my drive configuration if that helps:

/dev/sda = SSD with Windows 10 only (Windows C drive and the reserved partition).

/dev/sdb = HDD with NTFS and EXT4 partitions containing regular data only, no OS here currently.

/dev/sdc = SSD (GPT partition) with Ubuntu 18.04 (/ partition), swap area and a shared NTFS game drive.

GRUB is installed on /dev/sda.

EDIT:
I created a new parition table on /dev/sdc using msdos instead of GPT. Then I reinstalled Ubuntu and installed GRUB on /dev/sdc. After these changes, sudo hibernate seems to be working.

ANOTHER EDIT:
Because sudo hibernate seems to go to hibernation without locking the screen (i.e. anyone could turn on the PC and automatically be logged in), I added this line to /etc/sudoers (cln is my username):

cln ALL=NOPASSWD: /usr/sbin/hibernate

and made this executable script:

#!/bin/bash



xdg-screensaver lock

sudo hibernate

Now I am able to just double-click on this script, select Run, and directly go to hibernation while also locking the screen. Much more comfortable.

This instruction worked for my Ubuntu 18.04 installation.

1. 
   sudo apt install hibernate It will install hibernate and other dependencies which are needed to hibernate


2. 
   grep swap /etc/fstab (find UUID)


3. 
   sudoedit /etc/default/grub
   At the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" add UUID of swap. The line looks like this GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID of swap"


4. 
   sudo update-grub


5. Restart, and after restart sudo systemctl hibernate. If everything works ok add menu entry's.


6. sudo gedit /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla
   now paste this:

[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

7. Restart the computer


8. Install https://extensions.gnome.org/extension/755/hibernate-status-button/