Public bug reported:

I do not know how to reproduce this error sometimes Xorg crashes and am
taken back to the login screen

After login, the apport bug report screen appears.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  361.28  Wed Feb  3 15:48:04 
PST 2016
 GCC version:  gcc version 5.3.1 20160323 (Ubuntu 5.3.1-13ubuntu1)
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Apr  3 09:44:07 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.8, 4.4.0-15-generic, x86_64: installed
 bbswitch, 0.8, 4.4.0-16-generic, x86_64: installed
 nvidia-361, 361.28, 4.4.0-15-generic, x86_64: installed
 nvidia-361, 361.28, 4.4.0-16-generic, x86_64: installed
GraphicsCard:
 Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) 
(prog-if 00 [VGA controller])
   Subsystem: Dell Broadwell-U Integrated Graphics [1028:0631]
   Subsystem: Dell GM108M [GeForce 830M] [1028:0631]
InstallationDate: Installed on 2016-03-27 (7 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
MachineType: Dell Inc. Latitude 3450
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-16-generic.efi.signed 
root=UUID=1fee07fd-117c-493d-97c1-69085515812d ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/13/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0J6K1N
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA10:bd01/13/2016:svnDellInc.:pnLatitude3450:pvr:rvnDellInc.:rn0J6K1N:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude 3450
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.2+16.04.20160318-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.18.1-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160218-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2

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


** Tags: amd64 apport-bug crash ubuntu xenial

** Summary changed:

- Xorg with Nvidia random crash after login
+ Xorg with Nvidia random crash after login on Lightdm

** Summary changed:

- Xorg with Nvidia random crash after login on Lightdm
+ Xorg with Nvidia random crash a few seconds after login on Lightdm

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1565464

Title:
  Xorg with Nvidia random crash a few seconds after login on Lightdm

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1565464/+subscriptions

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