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linux - PM: Hibernation image not present or could not be loaded


After hibernating with systemctl hibernate, the system boots normally as if it had been shutdown. I have the resume parameter in the kernel line and the resume hook in mkinitcpio.conf


These are the relevant kernel messages:


$ dmesg | grep -i swap
[    0.000000] Command line: initrd=\initramfs-linux.img root=/dev/sda2 rw resume=/dev/sda4
[    0.000000] Kernel command line: initrd=\initramfs-linux.img root=/dev/sda2 rw resume=/dev/sda4
[    0.350295] PM: Checking hibernation image partition /dev/sda4
[    8.776686] Adding 8191996k swap on /dev/sda4.  Priority:-1 extents:1 across:8191996k FS
$ dmesg | grep -i hibern
[    0.350295] PM: Checking hibernation image partition /dev/sda4
[    0.350301] PM: Hibernation image not present or could not be loaded.

So the only remaining possibility is that systemctl didn't write to disk. In fact, when I run the command, the screen first goes blank for a couple of seconds, then I can see my terminal again, and finally it shutdowns itself.


I read that pm-utils do not work very well with systemd, so I wouldn't want to switch to those. Any suggestions?


Thanks!



Answer



To elaborate @AdrianRatnapala's comment, you have to:




  1. Find uuid of your swap partition. Suppose the partition is sdb3, then


    $ ls -l /dev/disk/by-uuid/ | grep sdb3
    lrwxrwxrwx 1 root root 10 окт.   9 08:59 1dd7e123-1f82-45f0-a202-0ff3ea6f081a -> ../../sdb3


  2. Open /etc/default/grub, and find the line starting with GRUB_CMDLINE_LINUX_DEFAULT=". Add there between the quotes resume=/dev/disk/by-uuid/your-swap-uuid. As an example:


    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash resume=/dev/disk/by-uuid/1dd7e123-1f82-45f0-a202-0ff3ea6f081a"

  3. Run as a root update-grub

  4. A reboot is needed to use the new kernel command-line.


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