24.04 TPM backed FDE regression following snapd 2.62 update

[Philip Roche]

Azure testing has reported an issue following update of the nullboot package from 0.5.0-0ubuntu3 to 0.5.1-0ubuntu1 which I am informed included the vendoring of snapd 2.62.

This has caused a regression and TPM backed FDE instances no longer boot as expected.

[Philip Roche (philroche)]

This is a 24.04 release blocking bug as it is a regression and results in a failure to boot for TPM backed FDE instances.

[Mate Kukri (mkukri)]

I've installed desktop FDE from the 24.04 beta ISO. It installed and booted just fine. It also results in an installation with pc-kernel 23.10/stable which contains a shim 15.7-0ubuntu1.

[Mate Kukri (mkukri)]

Daily ISO also works fine. Noble seems to use the old pc-kernel snap and snapd in the archive wasnt updated for this either, so removing that.

[Philip Roche (philroche)]

I have removed references to desktop FDE from the description. Thank you for testing.

[Mate Kukri (mkukri)]

This is just a matter of updating encrypt-cloud-image with the new secboot, please see: https://github.com/canonical/encrypt-cloud-image/pull/22

[Samuel W (samwein)]

I can confirm that updating from 23.10 to 24.04 also keeps the channel for pc-kernel at 23.10/stable. However the upgrade did install snapd 2.62 (which seems to work fine). Changing the channel for pc-kernel to 24/stable works fine though.