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where does hide hibernate btw - i only know how to suspend to ram :think_bread:

But whether it works depends.. on distribution, luks and/or LVM or not, and your swap partition needs to be big enough to hold current swap PLUS hibernation image (RAM)
And then it may work or not. i.e. for me resume is ok, but after some time or the next or second sleep/standby (not hibernate) things start acting weird..

erAck @erAck

From times when I set it up:

Output of: swapon -s
in /etc/default/grub append to

Or, if swap on LVM

grub2-mkconfig -o /boot/grub2/grub.cfg

See also

@erAck thank you, will give it a try