Comment 14 for bug 2022312

I'm curious, does it work if you drop "acpi-s3" from the features in /usr/share/qemu/firmware/40-edk2-x86_64-secure-enrolled.json ? If I understand that setting correctly, it should be giving libvirt the hint it needs to figure out whether or not the firmware supports S3, and in focal that setting looks wrong since we're using 64-bit PEI which does not. Hopefully libvirt has the smarts to pass '-global ICH9-LPC.disable_s3=1' when "acpi-s3" is absent. If so, correcting the descriptor in an SRU seems like a path forward.

Note: We introduced the 4M images into Ubuntu w/ 64-bit PEI at some point after focal, but we switched them to 32-bit PEI before 22.04, so I believe advertising the "acpi-s3" feature is correct in jammy. When we backported the 4M images to focal earlier this year (bug 1885662), we backported the intermediate version that still used 64-bit PEI. I regret that we didn't think to also include the switch to 32-bit PEI at that time, it would have been the safest time to do it, and consistent with jammy. But now that we've released them w/ 64-bit PEI into an LTS, I don't know how we'd go about demonstrating that no one has grown reliant upon it.