Povolení hibernace na Linuxu

Povolení hibernace pro Ubuntu 22.04 se swap souborem:

• Make your /swapfile have at least the size of your RAM

   sudo swapoff /swapfile
   sudo dd if=/dev/zero of=/swapfile bs=$(cat /proc/meminfo | grep MemTotal | grep -oh '[0-9]*') count=1024 conv=notrunc
   sudo mkswap /swapfile
   sudo swapon /swapfile

   Note the UUID of the partition containing your /swapfile:

   $ sudo findmnt -no SOURCE,UUID -T /swapfile
   /dev/nvme0n1p5 20562a02-cfa6-42e0-bb9f-5e936ea763d0

• Edit the SystemD hibernate service using sudo systemctl edit systemd-hibernate.service and fill it with the following content:

   [Service]
   ExecStart=
   ExecStartPre=-/bin/run-parts -v -a pre /lib/systemd/system-sleep
   ExecStart=/usr/sbin/s2disk
   ExecStartPost=-/bin/run-parts -v --reverse -a post /lib/systemd/system-sleep

• Note the resume offset of your /swapfile:
  • Run sudo filefrag -v /swapfile
  • In the "physical_offset" column, copy the first row number (without dots). Value example: 34816.

• Configure Grub to resume from the swapfile by editing /etc/default/grub and modify the following line:

   GRUB_CMDLINE_LINUX_DEFAULT="resume=UUID=20562a02-cfa6-42e0-bb9f-5e936ea763d0 resume_offset=34818 quiet splash"

• Update Grub:

   sudo update-grub

• Create the following /etc/initramfs-tools/conf.d/resume:

   RESUME=UUID=20562a02-cfa6-42e0-bb9e-5e936ea763d0 resume_offset=34816
   # Resume from /swapfile

• Update initramfs:

   sudo update-initramfs -u -k all

• K povolení volby hibernace v menu upravte soubor:

sudo mcedit /var/lib/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla

Přidat následující obsah:

[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
ResultActive=yes

Now you can hibernate with:

sudo systemctl hibernate.

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