I reinstalled Manjaro this week from manjaro-kde-20.1-rc1-stable-staging-200717-linux57.iso. I usually customize my /etc/default/grub and /etc/mkinitcpio.conf after installing. The first thing I noticed when I opened /etc/default/grub was that there's no "resume" Linux kernel parameter set. I found the UUID of my swap partition and added the missing parameter. Next I opened /etc/mkinitcpio.conf and noticed there was no "resume" hook listed under HOOKS. I added that too. I just wanted to let the devs know that this is not happening automatically during the install. Not having these set would make resuming from hibernation fail and could cause data loss if someone doesn't save a file before hibernating.