I've upgraded from Wheezy to Jessie and from Jessie to Stretch, which is a stretch, where I am currently residing (switched to the devil systemd, too).
Unfamiliar with systemd commands, etc, I can't seem to find for the moment the exact message (after a minor delay) at boot which brings me here (of course I could reboot once again if you insist). It's something like "Tired of waiting for resume/suspend." This seems to be related to my swap partition (whose entry was commented out during the upgrade). There's also something about an encryption key, because the swap is encrypted. I noticed that the swap UUID changed (from jessie to stretch apparently). I noticed because I ran lsblk -f, got its new UUID, uncommented and corrected the now erroneous UUID entry in /etc/stab, also corrected the entry in /etc/initramfs-tools/conf.d/resume and 'ran update-initramfs -u', but to no avail. swapon -s reveals Filename Type Size Used Priority /dev/dm-0 partition 6915068 0 -1 I'm fairly confident now that the 'key' message was: cryptsetup: WARNING: target cryptswap1 has a random key, skipped Anyway I'm in the dark. PS: root@einstein:/home/curty# dmsetup ls cryptswap1 (254:0) -- “True terror is to wake up one morning and discover that your high school class is running the country.” – Kurt Vonnegut