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[Troy Ready <troy@xxxxxxxxxxxxx>]

The same issue is affecting myself and a colleague - everything is
working correctly with patch levels before -30, but -30 causes the
encryption prompt to appear distorted (like a strange zoomed resolution)
and the keyboard not to function.

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https://bugs.launchpad.net/bugs/1502598

Title:
  Boot hangs on encryption password prompt on 3.19.0-30

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Starting with kernel 3.19.0-30-generic, the password prompt for my
  disk encryption password hangs at boot.

  I can workaround the issue by booting with kernel 3.19.0-28-generic.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-28-generic 3.19.0-28.30
  ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
  Uname: Linux 3.19.0-28-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  mark       1788 F.... pulseaudio
   /dev/snd/controlC0:  mark       1788 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Oct  4 07:22:53 2015
  HibernationDevice: RESUME=UUID=4392843b-ec3d-442b-8159-f2e4bed58105
  InstallationDate: Installed on 2015-09-20 (14 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. XPS 13 9343
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-28-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro noprompt persistent quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-28-generic N/A
   linux-backports-modules-3.19.0-28-generic  N/A
   linux-firmware                             1.143.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/14/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0TM99H
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd07/14/2015:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.sys.vendor: Dell Inc.

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