Public bug reported:

Since upgrading from version 14.10 to Kubuntu 15.04, my system does not
boot normally any more.

Maybe it's only a stupid oversight on my part, but not being a systemd
pro, I'm currently at a loss of how to debug this any further.

Hints and pointers to appropriate documentation are welcome!

Kubuntu 15.04 quickly boots to a specific point where it seems to try to
enable a dm-crypt partition which also carries /home, beside other data,
and simply stalls.

I'm not asked to enter my crytpdisk password and I also cannot enter it
blindly without being asked.

You can see the point where it stalls in the attached "screenshot"
(photo of my screen).

I can then press Ctrl+Alt+Del to cleanly restart the system but I could
not find a way to get beyond this point with systemd.

Using the alternative boot option with upstart works flawlessly.
(Although booting with this boot option is really slow and it takes a
while to reach the graphical login screen - it basically looks as if the
system is waiting for some name resolving timeouts during boot, but
that's a different issue, if've not debugged it further and maybe it's
just gone once systemd works to boot my machine.)

Further info about my setup:

$ cat /etc/crypttab                                                             
                                   
crypt /dev/mapper/main-cryptstore none luks,noearly,discard  

$ mount | egrep crypt
/dev/mapper/crypt on /mnt/crypt type ext4 (rw,relatime,data=ordered)
/dev/mapper/crypt on /home type ext4 (rw,relatime,data=ordered)
/dev/mapper/crypt on /var/lib/mysql type ext4 (rw,relatime,data=ordered)

Here the first entry is the actual mount point while the other mount
points are bind mounts:

$ cat /etc/fstab | egrep crypt
/dev/mapper/crypt       /mnt/crypt      ext4    defaults        0       2       
                                                    
/mnt/crypt/home                 /home           none    bind    0       0       
                                                    
/mnt/crypt/var_lib_mysql        /var/lib/mysql  none    bind    0       0

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: systemd 219-7ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Mon May 11 20:28:18 2015
MachineType: Sony Corporation SVS13A3W9ES
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-16-generic 
root=/dev/mapper/main-root ro quiet init=/sbin/upstart
SourcePackage: systemd
SystemdDelta:
 [EXTENDED]   /lib/systemd/system/systemd-timesyncd.service -> 
/lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf
 
 1 overridden configuration files found.
UpgradeStatus: Upgraded to vivid on 2015-04-28 (13 days ago)
dmi.bios.date: 03/13/2013
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: R1021C8
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnInsydeCorp.:bvrR1021C8:bd03/13/2013:svnSonyCorporation:pnSVS13A3W9ES:pvrC60BRBTW:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: SVS13A3W9ES
dmi.product.version: C60BRBTW
dmi.sys.vendor: Sony Corporation

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

** Attachment added: "20150511_001.jpg"
   
https://bugs.launchpad.net/bugs/1453912/+attachment/4395710/+files/20150511_001.jpg

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https://bugs.launchpad.net/bugs/1453912

Title:
  systemd does not allow to boot with /home on dm-crypt

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