Off-topic but possibly necessary context:

Ubuntu (major) releases are time based. The time of the release is indicated in 
the release version. As such, Ubuntu 18.10 will be released in year (20)18, 
month 10. 
More precise release dates are provided at https://wiki.ubuntu.com/Releases

Point releases of LTS versions do not necessarily coincide with other
releases. Ubuntu 16.04.2 LTS was released on February 16, 2017 (so
between Ubuntu 16.10 (Oct '16) and Ubuntu 17.04 (Apr '17)), which
suggests that Ubuntu 18.04.2 may release in February 2019.

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https://bugs.launchpad.net/bugs/1727356

Title:
  Login screen never appears on early generation Intel GPUs (Core2 and
  Atom etc)

Status in GNOME Shell:
  Confirmed
Status in mutter package in Ubuntu:
  Fix Released
Status in mutter source package in Bionic:
  Triaged
Status in mutter source package in Cosmic:
  Fix Released

Bug description:
  Wayland sessions (including the login screen itself) don't start up on
  older Intel GPUs.

  ---

  Workaround:

  Ctrl+Alt+F4, log in, edit /etc/gdm3/custom.conf and uncomment the line:
  #WaylandEnable=false

  ---

  Proposed fix:
  https://gitlab.gnome.org/GNOME/mutter/merge_requests/160

  ---

  $ lsb_release -rd
  Description:  Ubuntu 17.10
  Release:      17.10

  Upgraded from 17.04 today.

  Steps to reproduce:

  - Start the PC or log out/end session in case it's running with an Xorg 
desktop already.
  - Attempt to log in, using 'Ubuntu'

  Expected to happen:

  Desktop appears.

  Actually happening:

  5 seconds of black screen, then the login screen appears again.

  Partial diagnosis:

  - Logging in using 'Ubuntu on Xorg' works fine and as expected.

  - Extracted a syslog of such a failed attempt, see attached file.
  ---
  ApportVersion: 2.20.7-0ubuntu3.1
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  DisplayManager: gdm3DistroRelease: Ubuntu 17.10
  InstallationDate: Installed on 2016-05-04 (539 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.1)
  Package: gnome-shell 3.26.1-0ubuntu5
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Tags: artful package-from-proposed third-party-packages
  Uname: Linux 4.13.0-16-generic x86_64
  UpgradeStatus: Upgraded to artful on 2017-10-25 (0 days ago)
  UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo www-data
  _MarkForUpload: True

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