[Bug 1574317] Re: Prompt to decrypt LVM device is hidden behind (blank) splash screen

[Steve Langasek]

Your crypttab contains:
 sda3_crypt UUID=ad243744-ddc3-4839-b492-5ede0ec8aecc none luks,discard

Your fstab does not list sda3_crypt, but it does list your root and home
partitions as being on /dev/mapper/lubuntu-vg.

Is lubuntu-vg a crypted VG?  I.e., is your root partition encrypted -
such as you would get if using the Ubuntu installer's "encrypt whole
disk" option?

This is relevant for understanding where the bug lies, since different
code paths are used to prompt for passphrases in the initramfs (root
partition) vs. after boot (other partitions).

This bug is not reproducible for me here on Ubuntu 16.04.

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https://bugs.launchpad.net/bugs/1574317

Title:
  Prompt to decrypt LVM device is hidden behind (blank) splash screen

Status in plymouth package in Ubuntu:
  Incomplete

Bug description:
  After updating from 15.10 to 16.04, the passphrase prompt to decrypt
  my LVM disk is not presented when the boot splash screen is enabled.
  The bluish background is drawn and then the boot hangs indefinitely,
  waiting for the passphrase to be typed with no on-screen indication of
  such.  Typing the passphrase and pressing enter continues to boot
  normally.  Booting with 'nosplash' on the command line shows a text-
  mode passphrase prompt that works normally.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: cryptsetup 2:1.6.6-5ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Sun Apr 24 11:42:33 2016
  InstallationDate: Installed on 2015-06-04 (324 days ago)
  InstallationMedia: Lubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  SourcePackage: cryptsetup
  UpgradeStatus: Upgraded to xenial on 2016-04-22 (1 days ago)
  crypttab: sda3_crypt UUID=ad243744-ddc3-4839-b492-5ede0ec8aecc none luks,discard

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