Hibernation stops computer but restart does not restore programs, starts new session instead

[FancierTech]

Duplicate of this topic, I guess… Anyway, this helped me when I had the same problem:

Added swap partition, hibernation results in complete shutdown instead?

It looks like your resume function is not properly set. You need a swap partition entry in your /etc/fstab, then resume=UUID=place here the swap partition UUID somewhere after the first " in the line starting GRUB_CMDLINE_LINUX_DEFAULT=" of your /etc/default/grub and the resume hook set at the end of HOOKS=(base .... resume) within the brackets in your /etc/mkinitcpio.conf. At the end run sudo mkinitcpio -P sudo update-grub and reboot.