Настраиваем спящий режим в Ubuntu 20.4+

статья

apt purge uswsusp  # удаляем устаревший пакет
cat /proc/swaps
findmnt -no UUID -T /swapfile  # если swap в файле -> 4a59c6a7-ca54-4e24-a362-3eac83bfe226
sudo filefrag -v /swapfile  # первый physical offset  -> 4974592

/etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=UUID=4a59c6a7-ca54-4e24-a362-3eac83bfe226 resume_offset=4974592"

sudo update-grub

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

RESUME=UUID=4a59c6a7-ca54-4e24-a362-3eac83bfe226 resume_offset=4974592

sudo update-initramfs -c -k all

Test:

sudo systemctl hibernate
systemctl status systemd-hibernate.service

/etc/polkit-1/localauthority/50-local.d/com.ubuntu.desktop.pkla

[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