Trios snapshot boots after patching /usr/share/initramfs-tools/init
This is needed if util-linux-2.25x is installed. It's not needed if util-linux is pinned/held to 2.20x.
patch_init_for_util-lin:
https://gist.github.com/fsmithred/f7e5b18bc93bc74aa5c7init_for_util-lin.patch
https://gist.github.com/fsmithred/8232aed6b015d16c935aCopy both files to the same directory, and as root, run 'bash patch_init_for_util-lin'.
Then you can make a snapshot that will boot. I thought it needed 'update-initramfs -u' after the patch, but I forgot to do it, and apparently, it isn't needed.