You're welcome.

In this case the correct status is 'Invalid' since it's not a bug in the
default Ubuntu installation. That said, I may investigate changing the
default file we install so that it's more obvious and people are less
likely to make the same mistake if they want to change anything.

** Changed in: gdm3 (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1808125

Title:
  Ubuntu 18.10 boot hangs with INTEL GRAPHICS at msg "Starting bpfilter"

Status in gdm3 package in Ubuntu:
  Invalid

Bug description:
  This is not a question, but I found no thread to report this bug and
  workaround on NON-NVIDIA-BASED systems:

  Ubuntu 18.10, kernel 4.18.0-12-generic, GNOME Shell 3.30.1 on X11,
  after a Dec 9 update:

  Boot hangs at message, "Starting bpfilter." Gnome Display Manager
  (login) fails to start. No keyboard response, tapping the power button
  just once immediately initiates power-down. Other users have reported
  successfully fixing this by removing nVidia drivers or disabling
  Wayland in GDM3 (uncommenting WaylandEnable=false in
  /etc/gdm3/custom.conf.)

  However, my HP laptop runs Intel graphics, and has no nVidia drivers
  installed.

  WORKAROUND
  I selected Enable Networking in Recovery Mode, then Drop to Shell Prompt 
(root,) and ran 

   apt update && apt install slim

  to install SLiM display manager. the installation prompted me to
  choose SLiM or GDM as the default, I chose SLiM, and was able to login
  finally (after rebooting 50+ times.)

  If you already have an alternate display manager installed, you can
  switch with "sudo dpkg-reconfigure gdm" and select the alt dm.

  This will probably be just a provisional workaround for the "bpfilter hang" 
on non-nVidia systems if all the other suggested solutions didn't work for you. 
BTW, I also tried LightDM a former Ubuntu DM, but got the identical bootup hang.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.10-0ubuntu13.1
  Architecture: amd64
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 18.10
  InstallationDate: Installed on 2018-05-07 (219 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  NonfreeKernelModules: wl
  Package: gdm3 3.30.1-1ubuntu5
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17
  Tags:  cosmic
  Uname: Linux 4.18.0-12-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  mtime.conffile..etc.gdm3.custom.conf: 2018-12-10T07:21:25.671742

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