After other investigations, I checked that lvm2 was missing after the 15.10 upgrade.
** Attachment added: "update-initramfs logs" https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1513415/+attachment/4513501/+files/initrd.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1513415 Title: cryptsetup blocks between mountroot and bottom in initramfs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1513415/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
