Systemctl hibernate does not resume, acting like shut-down

I grew tired of my laptop losing too much battery while in suspend and therefor wanted to setup hibernate. However, I can not get it to work. Systemctl hibernate shuts off the laptop, but it does not resume its previous state when turned on again.I use Ubuntu 22.04.4 LTS and Windows 11 in a dual boot configuration and I am trying to hibernate Ubuntu (which is the main thing I am using) on a Lenovo L13 Yoga.

I tried a lot of things I found in other posts, the last and biggest post being Ubuntu 18.04 can't resume after hibernate.

Currently I have the following configuration:

cat /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla:

[Re-enable hibernate by default in upower]Identity=unix-user:*Action=org.freedesktop.upower.hibernateResultActive=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-inhibitResultActive=yes[Enable hibernate to be run via cron]Identity=unix-user:*Action=org.freedesktop.login1.hibernate;org.freedesktop.login1.hibernate-multiple-sessionsResultAny=yes

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

RESUME=UUID=5147e4a0-81c2-440a-ba09-ae762f4304fbRESUME_OFFSET=52942848

cat /etc/default/grub

# If you change this file, run 'update-grub' afterwards to update# /boot/grub/grub.cfg.# For full documentation of the options in this file, see:#   info -f grub -n 'Simple configuration'GRUB_DEFAULT="saved"GRUB_TIMEOUT_STYLE="hidden"GRUB_TIMEOUT="10"GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`"GRUB_CMDLINE_LINUX_DEFAULT="resume=UUID=5147e4a0-81c2-440a-ba09-ae762f4304fb resume_offset=52942848"GRUB_CMDLINE_LINUX=""

cat /etc/fstab

# /etc/fstab: static file system information.## Use 'blkid' to print the universally unique identifier for a# device; this may be used with UUID= as a more robust way to name devices# that works even if disks are added and removed. See fstab(5).## <file system> <mount point>   <type>  <options>       <dump>  <pass># / was on /dev/nvme0n1p5 during installationUUID=5147e4a0-81c2-440a-ba09-ae762f4304fb /               ext4    errors=remount-ro 0       1# /boot/efi was on /dev/nvme0n1p1 during installationUUID=5E7F-D0A8  /boot/efi       vfat    umask=0077      0       1#UUID=cbc63938-26a9-47c6-b63e-3a1a1b00ee09 none swap sw 0 0/swapfile                                 none            swap    sw              0       0

free -h

               total        used        free      shared  buff/cache   availableMem:            15Gi       2,0Gi        10Gi       575Mi       2,7Gi        12GiSwap:           20Gi          0B        20Gi

sudo filefrag -v /swapfile

Filesystem type is: ef53File size of /swapfile is 22548578304 (5505024 blocks of 4096 bytes) ext:     logical_offset:        physical_offset: length:   expected: flags:   0:        0..       0:   52942848..  52942848:      1:               1:        1..    2047:   52942849..  52944895:   2047:             unwritten

cat /sys/power/state

freeze mem disk

cat /sys/power/disk

[platform] shutdown reboot suspend test_resume 

This is everything I can think of that might be relevant. Please ask if there is anything else I can provide.

EDIT:I removed the swapfile and created a swap partition to try to resume from there, following the instrucions in https://help.ubuntu.com/community/SwapFaq and https://www.geeksforgeeks.org/how-to-enable-hibernate-in-ubuntu-22-04-lts/.(As a consequence, I now see the following GRUB menue

EDIT3: this was only happening because I messed up the boot menu, I fixed it and now it behaves exactly like with the swapfile)But it still doesn't resume any of the apps I have open before hibernating. Could there be anything that keeps my laptop from writing the RAM to the swap partition?

EDIT2:I have used "Grub Customizer" in the past to edit the boot sequence scripts. Though I've not used it to edit the boot menu to include resume, but directly edited the file with nano. According to this "https://ubuntuhandbook.org/index.php/2021/08/enable-hibernate-ubuntu-21-10/" Grub Customizer might mess with enabling hibernate?