Comment 7 for bug 1859049

> "linux-signed-* packages were transitional and were removed in the 5.4"

Shame we only find this out after it's done.

IRC chat with vorlon confirms that since 2019, linux-image-generic *will* have the signed bits already, this is change back through Trusty (precise does not have the right kernel bits to do this); so pending confirmation with Kernel team, but MAAS/Curtin should just use linux-image-generic.

Things to do

1) determine how long linux-signed-generic metapackage will live in previous releases (it's already gone in focal)
2) determine if other kernel varients (linux-image-lowlatency, etc) will also be signed

Curtin can change to installing linux-image-generic on focal and newer releases (in places where it would normally have used linux-signed-generic). MAAS will need to do the same if it's providing kernel-mappings (like it was in this bug).