Public bug reported:

Fresh install of 09/07 image on Lenovo y510p laptop GK107M [GeForce GT 755M]
nvidia-375 drivers installed, tested.
Then fully updated
Absolutely nothing else done..

Note: this occurred both before & after the gdm3 update.

What happens:
Attempting to restart from either the gui or in terminal leads to a black 
screen with blinking cursor. Waiting does nothing.
Going to tty1 shows wall of text, cursor just blinks there also.

However if I go to tty7 then the shutdown immediately proceeds &
finishes.

What also works is instead of attempting shutdown  normally going to
tty2 & issuing command there.

As A side note this does not occur with lightdm

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gdm3 3.25.90.1-0ubuntu4
ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8
Uname: Linux 4.12.0-12-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep  7 17:25:19 2017
InstallationDate: Installed on 2017-09-07 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170906)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gdm3 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

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https://bugs.launchpad.net/bugs/1715746

Title:
  Cannot shutdown or restart from user session with nvidia drivers via
  nvidia-prime installed

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