One more to report, this one got my son's computer, an older Asrock
machine.  Uninstalling the nVidia drivers allowed booting into the
desktop but then when none of the available nVidia drivers worked we
made the mistake of trying to install the Linux driver from nVidia's
site.  Apparently somewhere in the process it uninstalled the Noveau
drivers and now we can't even log into the system except via ssh.

I then tried reinstalling the Noveau package xserver-xorg-video-nouveau
and it claims it cannot be installed because

The following packages have unmet dependencies:
xserver-xorg-video-nouveau : Depends: xorg-video-abi-15
                             Depends: xserver-xorg-core (>= 2:
                             Recommends: libgl1-mesa-dri (>= 9.0)

If I tried to reinstall the xorg/xserver stuff, no matter what I tried I
kept getting these:

The following packages have unmet dependencies:
unity-control-center : Depends: libcheese-gtk23 (>= 3.4.0) but it is not going 
to be installed
                       Depends: libcheese7 (>= 3.0.1) but it is not going to be 
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by 
held packages.

But if I try to install those I get:

libcheese-gtk23 is already the newest version.
libcheese7 is already the newest version.

And if I tried to force install them, it showed that it is already
running libcheese-gtk23:amd64 (3.10.2-0ubuntu2) and libcheese7:amd64
(3.10.2-0ubuntu2) which are both higher versions than what xorg seems to
require, so I don't understand what is going on here.  Anyway, at this
point the system is pretty much totally broken as far as getting into
the desktop is concerned.

Is there any chance you can fix this and get a new kernel update out
very soon, like tonight or tomorrow?  Because if not, it looks like I
may have to reinstall from scratch, and even then I'm not entirely
certain I won't run into the exact same issue.

You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.

  14.04 Kernel update on 2/21 breaks Nvidia drivers

Status in xorg package in Ubuntu:

Bug description:
  Running fine with nvidia-384 until this kernel update came along.
  When booted into the new kernel, got super low resolution and nvidia-
  settings was missing most of its functionality - could not change

  Rebooted into 4.4.0-112 kernel and all was well.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 4.4.0-112.135~14.04.1-generic 4.4.98
  Uname: Linux 4.4.0-112-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  .proc.driver.nvidia.registry: Binary: ""
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  384.111  Tue Dec 19 23:51:45 
PST 2017
   GCC version:  gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  ApportVersion: 2.14.1-0ubuntu3.27
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Wed Feb 21 19:23:39 2018
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
   bbswitch, 0.7, 4.4.0-112-generic, x86_64: installed
   bbswitch, 0.7, 4.4.0-116-generic, x86_64: installed
   nvidia-384, 384.111, 4.4.0-112-generic, x86_64: installed
   nvidia-384, 384.111, 4.4.0-116-generic, x86_64: installed
   NVIDIA Corporation Device [10de:1c82] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Corp. Device [3842:6253]
  InstallationDate: Installed on 2015-03-03 (1086 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-112-generic 
root=UUID=5a88d2a1-0a24-415b-adc2-28435b13248a ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install) 08/15/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0302
  dmi.board.asset.tag: To be filled by O.E.M. M11AD
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
dmi:bvnAmericanMegatrendsInc.:bvr0302:bd08/15/2013:svnASUSTeKCOMPUTERINC.:pnM11AD:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnM11AD:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: M11AD
  dmi.product.version: System Version
  dmi.sys.vendor: ASUSTeK COMPUTER INC.
  version.compiz: compiz 1:
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.67-1ubuntu0.14.04.2
  version.libgl1-mesa-dri: libgl1-mesa-dri N/A
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Wed Feb 21 18:48:14 2018
  xserver.configfile: default
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.18.3-1ubuntu2.3~trusty4

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