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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1815122

and then change the status of the bug to 'Confirmed'.

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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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  Unable to login via tty

Status in linux package in Ubuntu:

Bug description:
  I am using Ubuntu 16.04.

  After upgrading the kernel from 4.4.0-141.167-generic to
  4.4.0-142.168-generic I am experiencing problem logging in via the
  tty. I am able to provide my username, but the terminal automatically
  submit password before I am able to type it. If I start the computer
  with the previous kernel (4.4.0-141.167) it works as expected.

  I have done strace on the tty in both scenarios while performing the login 
with the following command:

  "sudo strace -p 1572 -s 1024 -vff -o tty-login-issue/login"

  4.4.0-141.167-generic (works):

  4.4.0-142.168-generic (fails):

  Let me know if you need me to provide any additional details.
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
   /dev/snd/controlC0:  ivaosthu   3706 F.... pulseaudio
   /dev/snd/controlC1:  ivaosthu   3706 F.... pulseaudio
  CurrentDesktop: i3
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=08d4aeb0-e54b-475e-8a26-b9e8b488a314
  InstallationDate: Installed on 2016-08-12 (909 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
  MachineType: LENOVO 20EQS2HW00
  Package: linux (not installed)
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-142-generic.efi.signed 
root=UUID=a0472864-d2ab-4f9d-8b4c-e89db4dbd51b ro quiet nomodeset splash 
  ProcVersionSignature: Ubuntu 4.4.0-142.168-generic 4.4.167
   linux-restricted-modules-4.4.0-142-generic N/A
   linux-backports-modules-4.4.0-142-generic  N/A
   linux-firmware                             1.157.21
  Tags:  xenial
  Uname: Linux 4.4.0-142-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom davfs2 dip docker lpadmin plugdev sambashare sudo
  _MarkForUpload: True 05/10/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1EET52W (1.26 )
  dmi.board.asset.tag: Not Available 20EQS2HW00
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40697 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
dmi:bvnLENOVO:bvrN1EET52W(1.26):bd05/10/2016:svnLENOVO:pn20EQS2HW00:pvrThinkPadP50:rvnLENOVO:rn20EQS2HW00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: 20EQS2HW00
  dmi.product.version: ThinkPad P50
  dmi.sys.vendor: LENOVO

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