Are you using btrfs? If so, the relevant Debian bug report is probably https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=784881
** Bug watch added: Debian Bug tracker #784881 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=784881 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/1580308 Title: update-initramfs cryptsetup must correctly take into account PARTLABEL inside /etc/fstab Status in initramfs-tools package in Ubuntu: New Bug description: Systematically, - With a /etc/fstab using UUID or LABEL, update-initramfs works correctly - With a /etc/fstab using PARTLABEL, update-initramfs displays following error messages : cryptsetup: WARNING: failed to detect canonical device of PARTLABEL=Ubuntu-Gnome cryptsetup: WARNING: could not determine root device from /etc/fstab cryptsetup: WARNING: failed to detect canonical device of PARTLABEL=USR-Ubuntu The cryptsetup part of update-initramfs must correctly take into account PARTLABEL inside /etc/fstab Thank you in advance ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: initramfs-tools 0.122ubuntu8 ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CurrentDesktop: X-Cinnamon Date: Tue May 10 21:14:24 2016 InstallationDate: Installed on 2014-11-03 (553 days ago) InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) PackageArchitecture: all SourcePackage: initramfs-tools UpgradeStatus: Upgraded to xenial on 2016-05-09 (1 days ago) mtime.conffile..etc.initramfs-tools.initramfs.conf: 2016-02-21T22:22:01 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1580308/+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