On 7/8/23 07:38, Doug Herr wrote:
On Sat, Jul 8, 2023, at 5:11 AM, Patrick O'Callaghan wrote:
I'm experimenting with hibernating rather than suspending my system
overnight. However I get this:

$ sudo systemctl hibernate
Call to Hibernate failed: Not enough swap space for hibernation

But:

$ free -h
                total        used        free      shared  buff/cache   
available
Mem:            15Gi       4.6Gi       3.4Gi        80Mi       7.5Gi        10Gi
Swap:           71Gi          0B        71Gi
$ swapon
NAME           TYPE      SIZE USED PRIO
/SWAP/swapfile file       64G   0B   -2
/dev/zram0     partition   8G   0B  100

So it appears that I should have enough swap. What's going on?

If I remember right (and it has not changed) then you need an actual swap partition and 
not just a "swapfile".

I think the partition will also need to be listed in the Grub boot line also.

A swap file can work, but it needs special setup in the boot command line so the kernel can find it. You might be able to find a previous thread about that if you search the mailing list archives.
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