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One of my laptops cannot hibernate properly; when I close the lid or just let it sit for half an hour, I lose the session. The next power-on starts from a fresh boot. This is my son's laptop and he needs it for school. It's a giant pain that he has to start over all the time.

This answer gives ideas to test:

  • sudo systemctl suspend works!
  • sudo systemctl hybrid-sleep works! (from this answer)
  • sudo systemctl hibernate seems identical to a power off; the laptop switches off immediately and the next power-on starts from a fresh boot. So the suspend-then-hibernate choice is not going to work until I can fix the broken hibernate.
  • systemctl suspend without sudo does not suspend and I get a message "user gdm is logged in on nx. Please retry after closing inhibitors [...]" which is practically Latin to me, but there is a suggestion to use systemctl suspend -i which works although I do not understand this.
  • systemctl suspend without sudo does the same thing; only triggers when adding -i. But that is still equivalent to a power off and not a hibernate.
  • sudo pm-hibernate works exactly as it should! This command is taken from https://wiki.ubuntu.com/DebuggingKernelHibernate and required me to install pm-utils. It is not a solution though; I am not going to ask my son to run a sudo command (and his user account would not have rights anyway).

So why does pm-hibernate work but systemctl hibernate does not? And why is there no "suspend" or even "hibernate" in the GUI?? There is only "restart" and "power off".

  • Should I just use hybrid-sleep instead of hibernate?
  • Should I follow this answer to replace the hibernate with pm-hibernate?

/etc/systemd/sleep.conf contains:

HibernateDelaySec=3min
AllowSuspend=yes
AllowHibernation=yes
AllowSuspendThenHibernate=yes

/etc/systemd/logind.conf contains:

HandlePowerKey=suspend
HandleSuspendKey=suspend
HandleHibernateKey=suspend
HandleLidSwitch=suspend
HandleLidSwitchExternalPower=suspend
HandleLidSwitchDocked=ignore

In Settings > Power > Automatic Suspend the delay is set to 15 minutes. This is the lowest option but I do not know how that correlates to the files listed above. There is no setting for "Hibernate".

Torben Gundtofte-Bruun
  • 10,454

0 Answers0