substituir suspend por suspend-then-hibernate

sudo cp /usr/lib/systemd/system/systemd-suspend.service /usr/lib/systemd/system/systemd-suspend.serviceORG
sudo rm /usr/lib/systemd/system/systemd-suspend.service
sudo ln -s /usr/lib/systemd/system/systemd-suspend-then-hibernate.service /usr/lib/systemd/system/systemd-suspend.service

https://bbs.archlinux.org/viewtopic.php?id=257645