Hang on, I think there's something wedged here. You already have a /dev/mapper/vg-swap but this is *not* being created by crypttab as that obviously fails. This is also what confused me at first in comment 5. If you already have an LV which is called vg-swap, you can't additionally define a cryptswap target with the same name. I. e. you are trying to have /dev/mapper/vg-swap being the underlying encrypted device for the to-be-created /dev/mapper/vg-swap encrypted device.
Can you please rename vg-swap in /etc/crypttab and /etc/fstab to something else, like "cryptswap1"? -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1443413 Title: boot fails on cryptsetup random swap partition with "invalid argument" Status in systemd package in Ubuntu: Incomplete Bug description: Booting with systemd fails always at same stage. Using upstart just works. grep GRUB_CMDLINE_LINUX /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX="systemd.log_target=kmsg systemd.log_level=debug" grep debug /boot/grub/grub.cfg linux /vmlinuz-3.19.0-13-generic root=/dev/mapper/vg-root ro systemd.log_target=kmsg systemd.log_level=debug Sadly systemd-debug doesn't reveals more information what fails :-( lsb_release -rd Description: Ubuntu Vivid Vervet (development branch) Release: 15.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1443413/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
