Resume from Suspend or Hibernate on Notebook

Hi,
and a big thanks to all the creators of this nice os.
Tried some days ago the iso from a stick and now the XFCE-version is working on my little notebook (ACER B118).
I could rebuild most of my working environment, but there is (again) a problem I cannot solve:

Since the introduction of the 5.xx kernels I cannot use suspend/hibernate anymore on this machine (I found some questions regarding this, but no answers - for my problem at least).
If I configure the lid-switch for suspend, according to journalctl it reaches the suspend state, but if I open the lid nothing happens. Only cold reboot possible. No line in journal - absolute 0!
Tried this for hibernate - same result. journalctl says 'systemd-sleep[1979]: Performing sleep operation ‘hibernate’ , but only cold boot possible afterwards.
From what I found in Arch-wiki, I think there is some hook for systemd and/or kernel missing.
But this is by far beyond my knowledge…

Anybody can point me in a useful direction?
Thanks in advance!

No success for suspend so far.
But after studying this: https://wiki.archlinux.org/title/Power_management/Suspend_and_hibernate I got hibernate/resume working well.
The only missing item has been “resume=swap-partiton” in kernel-commands at bootup.
I think, this is missing in most/all grub-defaults and installer-programs.
Adding this to my rEFInd-config has been very easy, configuring my XFCE-powermanagement, too.