hibernate and Secure Boot, redux

[Chris Murphy]

On Fedora 28 Workstation with 4.17.0-0.rc7.git1.1.fc29.x86_64, on a
UEFI Secure Boot enabled system, I'm seeing this in the journal
following a low power situation.

Jun 02 15:11:33 f28h.local systemd[1]: Starting Hybrid Suspend+Hibernate...

After configuring a resume=UUID= line for the bootloader, hibernate
works (both enter and exit). This was previously inhibited on Secure
Boot enabled systems. Is this expected?

I'm just doing a double take.

Thanks,