Full disk encryption password input broken in 3.19.0.31

[Guy Taylor]

After updating the kernel from 3.19.0.28 to 3.19.0.31 the full disk encryption password entry was unusable on restart.

In 3.19.0.28 password entry works
in 3.19.0.31 password entry is displayed in the top left of the screen as if it was entered into the non-graphical boot logs

Current work around: revert to 3.19.0.28

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubuntu-release-upgrader-core 1:15.04.14.2
ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
Uname: Linux 3.19.0-28-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Oct 10 13:13:35 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-06-01 (130 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDistupgradeTermlog:
---
ApportVersion: 2.17.2-0ubuntu1.5
Architecture: amd64
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.04
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-06-01 (130 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
Package: linux (not installed)
Tags: vivid
Uname: Linux 3.19.8-031908ckt7-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True

[Guy Taylor (thebiggerguy)]

/dev/mapper/sda3_crypt is active and is in use.
  type: LUKS1
  cipher: aes-xts-plain64
  keysize: 512 bits
  device: /dev/sda3
  offset: 4096 sectors
  size: 248514560 sectors
  mode: read/write
  flags: discards

[Guy Taylor (thebiggerguy)]

For testing and debugging I have added a new key "abc123" and added "plymouth:debug" to grub. I will try and get a debug log.

[Guy Taylor (thebiggerguy)]

Attached is a plymouth-debug.log with quiet and splash disabled and plymouth:debug enabled. Unfortuanly I can not gatter a plymouth-debug.log for the failing case as there is no unecrypted disk for the lg to be written to.

Current state:
* Using kernel 3.19.0.28 works with graphical plymouth
* Using kernel 3.19.0.31 does not work with graphical plymouth
* Using kernel 3.19.0.31 does work without graphical plymouth

Current suggestion is that it is a kernel+plymouth related issue.

[Guy Taylor (thebiggerguy)]

Similar issues:
* https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1386005
* https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1169621
* https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1450781

on https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1386005:
This is a recent problem for me. I upgraded to 15.04 some time ago, but the problem only really appeared within the last week, possibly due to a dist-upgrade to linux-image-3.19.0-28 or linux-image-3.19.0-30. Unfortunately I'm not sure which upgrade I did when, and what else came in at the same time (I let my laptop sit a little too long without rebooting).

[Guy Taylor (thebiggerguy)]

Using http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.8-ckt7-vivid/linux-image-3.19.8-031908ckt7-generic_3.19.8-031908ckt7.201509251130_amd64.deb also solves the issue.

uname -a
Linux OtherLaptop 3.19.8-031908ckt7-generic #201509251130 SMP Fri Sep 25 15:32:30 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

This suggests it might be a Ubuntu patch that is causing the issue or it has already been fixed upstream.

[Guy Taylor (thebiggerguy)]

apport information

[Guy Taylor (thebiggerguy)]

apport information

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Shevek (r-launchpad-anarres-org)]

-28 works
Anything later does not work.

An operating system isn't very clever when I can't even boot it. Please, there are like 10 bugs for this now, please take this seriously.

[Shevek (r-launchpad-anarres-org)]

See https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1500751 comment #68 for apparently working solution.