[PKG-OpenRC-Debian] Bug#764564: openrc: fail to boot when encryption + lvm are present

[frozencemetery]

Source: openrc
Severity: grave
Justification: renders package unusable

Dear Maintainer,

When upgrading a sysv system (jessie) to openrc, if the partition table
includes a lvm partition with physical volume an encrypted partition,
installing openrc will render the system unbootable.

That is, the system will hang like so:
https://www.club.cc.cmu.edu/~rharwood/tmp/openrc.png
with the "perf interrupt" occuring after a few minutes of waiting and no
further activity.

This is a major problem because this partition layout is one of those
*recommended by the installer* for automatic partitioning.  As far as I can
tell, openrc is capable of booting both encrypted and LVM partitions
individually, but not both.

The minimized partition layout I use which fails is:

- disk 1: MSDOS table
  - partition 1: 200MB ext4, /boot
  - partition 2: *, physical volume for encryption
    - subpartition 1: *, physical volume for LVM
      - subsubpartition 1: * ext4, /

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (600, 'testing'), (400, 'unstable'), (200, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash