However maybe the make.log won't help. Because you appear to have a
working kernel driver.

I can also see this failure, which is important:

Jun 17 21:09:53 little-black-box gnome-shell[1367]: Unable to initialize 
Clutter: Unable to initialize the Clutter backend: no available drivers found.
Jun 17 21:09:53 little-black-box gnome-shell[1367]: Unable to initialize 
Clutter.

which would/should be related to:

Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): Creating default Display subsection in Screen section
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]:         
"Default Screen Section" for depth/fbbpp 24/32
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): Depth 24, (==) framebuffer bpp 32
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): RGB weight 888
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): Default visual is TrueColor
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
Applying OutputClass "nvidia" options to /dev/dri/card0
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (**) 
NVIDIA(0): Option "AllowEmptyInitialConfiguration"
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (**) 
NVIDIA(0): Enabling 2D acceleration
Jun 17 21:09:53 little-black-box systemd[1]: Starting NVIDIA Persistence 
Daemon...
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): NVIDIA GPU GeForce GTX 770 (GK104) at PCI:1:0:0 (GPU-0)
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (--) 
NVIDIA(0): Memory: 4194304 kBytes
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (--) 
NVIDIA(0): VideoBIOS: 80.04.c3.00.72
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): Detected PCI Express Link width: 16X
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): Validated MetaModes:
Jun 17 21:09:53 little-black-box nvidia-persistenced[1439]: Verbose syslog 
connection opened
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0):     "NULL"
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): Virtual screen size determined to be 640 x 480
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (WW) 
NVIDIA(0): Unable to get display device for DPI computation.
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): DPI set to (75, 75); computed from built-in default

Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): Setting mode "NULL"
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): Disabling shared memory pixmaps
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): Backing store enabled
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): Silken mouse enabled
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (==) 
NVIDIA(0): DPMS enabled
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
Loading sub module "dri2"
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
LoadModule: "dri2"
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) Module 
"dri2" already built-in
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): [DRI2] Setup complete
Jun 17 21:09:53 little-black-box /usr/lib/gdm3/gdm-x-session[1434]: (II) 
NVIDIA(0): [DRI2]   VDPAU driver: nvidia

But that looks like everything is working.


** Tags added: nvidia

** Summary changed:

- GDM no longer presents GUI login Ubuntu 18.04
+ [nvidia] GDM no longer presents GUI login Ubuntu 18.04

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to mutter in Ubuntu.
https://bugs.launchpad.net/bugs/1777378

Title:
  [nvidia] GDM no longer presents GUI login Ubuntu 18.04

Status in gdm3 package in Ubuntu:
  Incomplete
Status in mutter package in Ubuntu:
  Incomplete

Bug description:
  Background:

  Did a clean install of Ubuntu 18.04, standard Gnome desktop. Used
  nVidia proprietary drivers from Ubuntu repo. Worked quite well for
  over two weeks. When booting up on Friday 15th June, 2018 no longer
  had a GUI login screen. There was just a few lines in tty1. Can still
  login to other terminals and through SSH.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gdm3 3.28.2-0ubuntu1.2
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  Uname: Linux 4.15.0-23-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Sun Jun 17 22:53:22 2018
  InstallationDate: Installed on 2018-05-20 (28 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: gdm3
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.gdm3.custom.conf: 2018-05-31T00:51:08.204556
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2018-05-20 (28 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: gdm3 3.28.2-0ubuntu1.2
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  Tags:  bionic
  Uname: Linux 4.15.0-23-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: 2018-06-18T00:27:55.234654
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2018-05-20 (28 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: mutter
  PackageArchitecture: amd64
  ProcEnviron:
   LANG=en_US.UTF-8
   TERM=xterm-256color
   PATH=(custom, no user)
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  Tags:  bionic
  Uname: Linux 4.15.0-23-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  mtime.conffile..etc.gdm3.custom.conf: 2018-06-18T00:27:55.234654

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