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I usually always do sudo pm-hibernate to save my development session. Now I recently switched to ubuntu and since then I always run into some hibernation trouble.

Sometimes the system would crash and I didn't know why. But today I found out that my swap partition was too small.

Gparted didn't allow me to resize my swap partition but I still had space left on my sdd so I created a new partition with sufficient space as linux-swap

It is now on /dev/sdb3 and I updated /etc/fstab accordingly

UUID=79e3657d-48b6-4a7b-83b5-214550ea1109 none            swap    sw              0       0

➜ blkid /dev/sdb3 /dev/sdb3: UUID="79e3657d-48b6-4a7b-83b5-214550ea1109" TYPE="swap" PARTUUID="601ef3d8-03"

Buw now if I do sudo pm-hibernate, nothing really happens. It is as if I would have done a restart. So I assume that updating fstab with the new swap partition wasn't enough?

➜  ~ free -m
              total        used        free      shared  buff/cache   available
Mem:           7965        1229        5882          41         854        6466
Swap:          9988           0        9988
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  • See this. It may help you in your case.
    – Ashhar Hasan
    Jun 16, 2016 at 15:21
  • @AshharHasan Sadly that did not work, now if I resume hibernation, I only see a black screen.
    – Maik Klein
    Jun 16, 2016 at 21:46
  • Are you by any chance on kernel 4.4.0. It seems to have broken hibernation. Try using sudo systemctl hibernate on either kernel 4.2.x or 4.4.8 or later. It works for me on 4.2.x and 4.4.8. pm-utils is not the recommended way to hibernate though since it has been unmaintained since 2013.
    – Ashhar Hasan
    Jun 17, 2016 at 1:37
  • Try turning on logging for pm-utils. From a superuser shell, PM_DEBUG=true pm-hibernate. Paste the output in the file /var/log/pm-suspend.log in your answer. And please report what happens if you try to use systemctl hibernate.
    – Ashhar Hasan
    Jun 17, 2016 at 1:41
  • 1
    Yep systemctl hibernate works
    – Maik Klein
    Jun 18, 2016 at 11:13

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