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[Hadmut Danisch <hadmut@xxxxxxxxxx>]

Well, life would be much easier if there was some usable documentation
about what's going on within systemd.

By the way, I did not put in that 'swap' option manually, it was
inserted by the xubuntu 15.10 beta installer on cdrom/usb image. If you
choose to encrypt a partition and put a swap inside, it automatically
adds that swap option. So at least this crypttab option, the behaviour
of the installer, and systemd don't fit together.

Since you mention it: On my other machine with 15.10 I noticed the
problem that the machine does not recover from hibernate, but performs a
fresh boot, which meets your hint, that wake up does not work with that
style of crypt swap.

whatever it is what fills the device with random data, should honor the
luks option in the crypttab and use this thing as intended (i.e.
configure the device mapper and do a swapon).

-- 
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1506139

Title:
  15.10beta crashes encrypted swap partition

Status in systemd package in Ubuntu:
  New

Bug description:
  Hi,

  I'm usually using a setup with three partitions on a disk

  Partition 1:  plain ext4 boot partition mounted on  /boot
  Partition 2:  luks-encrypted swap
  Partition 3: luks-encrypted btrfs for /  /home ...

  both mentioned in /etc/crypttab like

  sda2_crypt UUID=a7976d5c-6191-436d-9cf9-2cedf17d0893 none luks,swap,discard
  sda3_crypt UUID=339b9a90-8292-422d-a3cf-eeb0317e9f84 none luks,discard

  
  With several machines I have installed 15.10 beta on and in several cases I experienced the problem that the swap is not activated at boot time and that /dev/disks/by-uuid does not contain a link to the swap partition, and the previously created luks-encrypted swap is destroyed after boot: It is not a luks partition anymore and filled with random (presumably encrypted) bytes without structure. 

  I first thought that this is a problem of the setup process, and
  repaired the swap manually. But then I found the partition destroyed
  again. This happend several times on several machines.

  I am not sure yet what exactly would destroy the partition.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: cryptsetup 2:1.6.6-5ubuntu2
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed Oct 14 18:12:58 2015
  InstallationDate: Installed on 2015-10-08 (5 days ago)
  InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
  SourcePackage: cryptsetup
  UpgradeStatus: No upgrade log present (probably fresh install)
  crypttab:
   sda2_crypt UUID=a7976d5c-6191-436d-9cf9-2cedf17d0893 none luks,swap,discard
   sda3_crypt UUID=339b9a90-8292-422d-a3cf-eeb0317e9f84 none luks,discard

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