Comment 0 for bug 1670336

Alberto Pianon (alberto-o) wrote :

Description: Ubuntu Zesty Zapus (development branch)
Release: 17.04
  Installato: 111-0ubuntu4
  Candidato: 111-0ubuntu4
  Tabella versione:
 *** 111-0ubuntu4 500
        500 zesty/main amd64 Packages
        100 /var/lib/dpkg/status

Ubuntu 17.04 uses swapfiles by default.

If you select the "encrypt home folder" option when creating the main user during Ubuntu 17.04 beta1 installation (which makes Ubiquity run also the ecryptfs-setup-swap command), after installation the system hangs a lot during boot, because it fails to activate swap (output of "systemctl status swapfile.swap" says "failed to activate swap /swapfile").

If you install Ubuntu 17.04 beta1 without selecting "encrypt home folder", and only after installation you run the ecryptfs-migrate-home utility, everything works. But as soon as you try to manually setup encrypyted swap (by running ecryptfs-setup-swap), you get the same problem as above.

This is due to an ecryptfs-utils bug.
In particular, ecryptfs-setup-swap puts in /etc/crypttab a line like this:

cryptswap1 UID=XXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64

(like there were a swap partition with UID=XXXXXXXX) while with a swapfile it should put the following line:

cryptswap1 /swapfile /dev/urandom swap,offset=1024,cipher=aes-xts-plain64

If you manually change that line and reboot, you get rid of the problem - before rebooting, check also that your /etc/fstab file ends with:
#/swapfile none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0

This bugs indirectly affects also Ubiquity, since choosing the "encrypt home folder" makes system hang a lot at boot (and when it finally starts it has no swap).

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: ecryptfs-utils 111-0ubuntu4
ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
Uname: Linux 4.10.0-9-generic x86_64
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Mar 6 12:47:39 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-03-05 (0 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Alpha amd64 (20170219)
 PATH=(custom, no user)
SourcePackage: ecryptfs-utils
UpgradeStatus: No upgrade log present (probably fresh install)