Xorg crashed with SIGABRT in OsAbort()

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would love to, but no idea!!

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-core 2:1.18.1-1ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
Uname: Linux 4.4.0-12-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 20160311 (Ubuntu 5.3.1-11ubuntu1)
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CrashCounter: 1
Date: Sun Mar 13 04:16:59 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.8, 4.4.0-11-generic, x86_64: installed
 bbswitch, 0.8, 4.4.0-12-generic, x86_64: installed
 nvidia-361, 361.28, 4.4.0-11-generic, x86_64: installed
 nvidia-361, 361.28, 4.4.0-12-generic, x86_64: installed
ExecutablePath: /usr/lib/xorg/Xorg
GraphicsCard:
 Intel Corporation Crystal Well Integrated Graphics Controller [8086:0d26] (rev 08) (prog-if 00 [VGA controller])
   Subsystem: Dell Crystal Well Integrated Graphics Controller [1028:0688]
   Subsystem: Dell GM204M [GeForce GTX 980M] [1028:0688]
InstallationDate: Installed on 2015-09-16 (179 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Alienware Alienware 17 R2
ProcCmdline: /usr/lib/xorg/Xorg -core :2 -seat seat0 -auth /var/run/lightdm/root/:2 -nolisten tcp vt7 -novtswitch
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-12-generic.efi.signed root=UUID=e5260f5b-6cdf-4dba-ac5c-7add65617252 ro
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 InitOutput ()
 ?? ()
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 07/24/2015
dmi.bios.vendor: Alienware
dmi.bios.version: A06
dmi.board.name: Alienware 17 R2
dmi.board.vendor: Alienware
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Alienware
dmi.chassis.version: A06
dmi.modalias: dmi:bvnAlienware:bvrA06:bd07/24/2015:svnAlienware:pnAlienware17R2:pvrA06:rvnAlienware:rnAlienware17R2:rvrA00:cvnAlienware:ct8:cvrA06:
dmi.product.name: Alienware 17 R2
dmi.product.version: A06
dmi.sys.vendor: Alienware
version.compiz: compiz 1:0.9.12.2+16.04.20160209-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu1
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

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1556418, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.