[Bug 1505445] [NEW] After dist-upgrade and restart system freezes

[mb]

Public bug reported:

Installed Wily beta-2 yesterday under VirtualBox 5.0.6 on Windows 10
host.

Today did dist-upgrade, restarted. Supplied passphrase for full disk
encryption, then got graphical login screen.

But password field is not enabled, and then system freezes.

Restart a second time works OK.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: ubuntu-release-upgrader-core 1:15.10.9
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
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Mon Oct 12 16:50:05 2015
InstallationDate: Installed on 2015-10-11 (1 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade wily

** Attachment added: "ubuntu_freeze.png"
   https://bugs.launchpad.net/bugs/1505445/+attachment/4493017/+files/ubuntu_freeze.png

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https://bugs.launchpad.net/bugs/1505445

Title:
  After dist-upgrade and restart system freezes

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Installed Wily beta-2 yesterday under VirtualBox 5.0.6 on Windows 10
  host.

  Today did dist-upgrade, restarted. Supplied passphrase for full disk
  encryption, then got graphical login screen.

  But password field is not enabled, and then system freezes.

  Restart a second time works OK.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ubuntu-release-upgrader-core 1:15.10.9
  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
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Mon Oct 12 16:50:05 2015
  InstallationDate: Installed on 2015-10-11 (1 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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