zfs-zed prevents hibernation via systemd

[curiousercreative]

I've had hibernation (suspend-then-hibernate) working for years on my System76 galp5 but I've noticed in the past few weeks that it's never hibernating, only suspending. Today I investigated and found that hibernation at a system level worked flawlessly (as expected) but that sudo systemctl hibernate would fail. Bellow are relevant log lines from /var/log/syslog. Because I'm not leveraging any zed functionality, I decided to remove the package with sudo apt remove zfs-zed and I confirmed that sudo systemctl hibernate now works flawessly.

Dec 24 15:40:21 localhost zed[129587]: Exiting
Dec 24 15:40:21 localhost goa-daemon[100581]: secret_password_lookup_sync() failed: The name is not activatable
Dec 24 15:40:21 localhost systemd[1]: zfs-zed.service: Deactivated successfully.
Dec 24 15:40:21 localhost goa-daemon[100581]: secret_password_lookup_sync() failed: The name is not activatable
Dec 24 15:40:21 localhost goa-daemon[100581]: secret_password_lookup_sync() failed: The name is not activatable
Dec 24 15:40:21 localhost dbus-broker[955]: A security policy denied :1.1124 to send method call /org/freedesktop/NetworkManager/Settings:org.freedesktop.NetworkManager.Settings.LoadConnections to org.freedesktop.NetworkManager.
Dec 24 15:40:21 localhost kernel: [359330.003667] video LNXVIDEO:00: Restoring backlight state
Dec 24 15:40:21 localhost kernel: [359330.102168] PM: hibernation: hibernation exit
Dec 24 15:40:21 localhost systemd-sleep[130667]: Failed to put system to sleep. System resumed again: Device or resource busy
Dec 24 15:40:21 localhost systemd[1]: zfs-zed.service: Scheduled restart job, restart counter is at 19.
Dec 24 15:40:21 localhost systemd[1]: Stopped ZFS Event Daemon (zed).
Dec 24 15:40:21 localhost systemd[1]: Started ZFS Event Daemon (zed).
Dec 24 15:40:21 localhost systemd[1]: systemd-hibernate.service: Main process exited, code=exited, status=1/FAILURE
Dec 24 15:40:21 localhost systemd[1]: systemd-hibernate.service: Failed with result 'exit-code'.
Dec 24 15:40:21 localhost systemd[1]: Failed to start Hibernate.
Dec 24 15:40:21 localhost systemd[1]: Dependency failed for System Hibernation.
Dec 24 15:40:21 localhost systemd[1]: hibernate.target: Job hibernate.target/start failed with result 'dependency'.
Dec 24 15:40:21 localhost systemd[1]: systemd-hibernate.service: Consumed 2.847s CPU time.
Dec 24 15:40:21 localhost zed[130751]: ZFS Event Daemon 2.2.6-1pop1~1729501373~22.04~093edd9 (PID 130751)
Dec 24 15:40:21 localhost systemd[1]: Stopped target Sleep.