Speaking of cloud-images generally I propose the following:

* Images in the ubuntu-cpc project by default should boot with an initramfs.
  * Revert the livecd-rootfs change which "Unconditionally set 
    GRUB_FORCE_PARTUUID in cloud images"
* Images with custom kernels can boot without an initramfs
  * Set GRUB_FORCE_PARTUUID as part of livefs-rootfs:live-build/functions 
replace_kernel() as this is used by the ubuntu-cpc project for each image that 
ships an optimized kernel intended to boot without initramfs.

Steve, I agree with everything you said in comment #21 about removing
not this functionality from Azure images.  I think there is room to
improve the experience for users that change their kernel and encounter
this behavior.  The panic/reboot behavior is unexpected and the mapping
of GRUB_FORCE_PARTUUID to initramfs-less boot is non-obvious to the end
user.  I don't immediately have suggestions to smooth this rough edge
but I feel that we need to take some time on this before completely
closing this bug out.

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https://bugs.launchpad.net/bugs/1870189

Title:
  initramfs does not get loaded

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