Can I add swap partition after I installed my system already?|

[megavolt]

Yes, you need to add 3 things:

1. A swap partition or swapfile
2. A resume=UUID=<long_number> to the kernel parameter in /etc/default/grub
3. Add resume to /etc/mkinitcpio.conf

Detailed information: Power management/Suspend and hibernate - ArchWiki

That should be an easy one:

Not restoring after hibernating

Thanks. I finally did it. Here is how: (Replace “[UUID_of_the_swap_partition]” with the actual UUID) In /etc/fstab added: UUID=[UUID_of_the_swap_partition] none swap defaults 0 0 In /etc/default/grub added: resume=UUID=[UUID_of_the_swap_partition] to GRUB_CMDLINE_LINUX In /etc/mkinitcpio.conf added: resume to HOOKS (after udev) sudo mkinitcpio -P && sudo update-grub That’s all. Hibernated and it resumed!