Comment 4 for bug 2031576

In mantic, kernel team has added the ability to produce self-signed kernel snaps, out of kernel team's build ppas, prior to completing secureboot verification and thus prior to the production secureboot signing.

The respin of a v6.4 kernel abi is now ready for amd64 in the stream2 build ppa, and a kernel snap is available for testing.

It is signed with the self-signed kernel team unstable secureboot certificate from https://ppa.launchpadcontent.net/canonical-kernel-team/unstable/ubuntu/dists/mantic/main/signed/linux-generate-amd64/6.4.0-2.2/signed.tar.gz

Please enroll that into DB prior to attempting installation.

Please use revision 1386 of pc-kernel, version 6.4.0.2.2 to verify if this issue is resolved. It is accessible from the following global store channel 23.10/edge/stream2 but also via manual inclusion (snap refresh --revision 1386 available publically, snap download --revision 1386 pc-kernel, or fetchable from launchpad librarian at https://launchpad.net/~canonical-kernel-snaps/+snap/mantic--linux--pc-kernel--edge--2/+build/2204108 )

This kernel snap was built using ubuntu-core-initramfs amd64 66+284+202308102031~ubuntu23.10.1 & snapd snapd 2.60.2+23.10.