When i choose hibernate the screen goes blank (no graphics output) and the computer keeps running. Hibernate worked for me in 13.1 nicely. What can be the cause? Where can I check some logs to investigate this?
I guess you end up pressing the power button, and booting again?
You might try examining the systemd log for any hibernation-related errors
journalctl -b 1
For other options read
Can you hibernate okay with the following?
I just tried hibernation from within GNOME with nVidia binary drivers and it worked fine. So it is not like it is broken generally. More details on hardware may help.