linux-signed-image-$abi depends on linux-image-$abi which, in turn, ensures your modules exist and your initramfs is built. Did you force installation of *just* the signed image without its dependencies?
linux-signed- image-$ abi depends on linux-image-$abi which, in turn, ensures your modules exist and your initramfs is built. Did you force installation of *just* the signed image without its dependencies?