Comment 28 for bug 1828604

Reproduced with the sutton-mccarthy-bionic-amd64-20190426-96.iso, here is summary of the finding -

- When the image was built last year, the gnome-* snaps depends on the content snap - gnome-3-26-1604.
- But the build process will pull the new gnome-* snaps, which (eg, gnome-calculator) depends on new content snap - gnome-3-28-1804. and keep using the old gnome-3-26-1604.
- During the Initialize stage of snapd, snapd could not solve prerequisites for gnome-* snaps and stuck in the wrong state, which blocking user install any snap.

The bugsy-config of the image need to refreshed and using gnome-3-28-1804.

The workaround for user will be manually fixing /var/lib/snapd/seed/seed.yaml and run "snap abort --last=seed", "sudo systemctl restart snapd"