Xorg crashed with SIGABRT in RRSetChanged()

[Asia]

This is definitely a duplicate, but nothing resembling it showed up.
LightDM didn't start immediately after booting, instead a blinking cursor was displayed for a few seconds. My computer wasn't responding to ctrl-alt-f1 during that time.

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: xserver-xorg-core 2:1.16.0-1ubuntu1
Uname: Linux 3.15.0-031500rc8-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CrashCounter: 1
Date: Sun Nov 30 18:56:04 2014
DistUpgraded: 2014-11-13 21:54:35,500 DEBUG enabling apt cron job
DistroCodename: utopic
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:1682]
 NVIDIA Corporation GF119M [GeForce GT 520M] [10de:1050] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:1682]
InstallationDate: Installed on 2013-12-26 (339 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: ASUSTeK Computer Inc. U40Sd
ProcCmdline: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.15.0-031500rc8-generic root=UUID=d1863b50-01bf-46e6-b12e-3821f72b0c9a ro drm.debug=0xe plymouth:debug
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 RRSetChanged ()
 RRScreenSetSizeRange ()
 xf86RandR12CreateScreenResources ()
 ?? ()
 ?? ()
Title: Xorg crashed with SIGABRT in RRSetChanged()
UpgradeStatus: Upgraded to utopic on 2014-11-13 (16 days ago)
UserGroups:

dmi.bios.date: 11/24/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: U40Sd.203
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: U40Sd
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrU40Sd.203:bd11/24/2011:svnASUSTeKComputerInc.:pnU40Sd:pvr1.0:rvnASUSTeKComputerInc.:rnU40Sd:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: U40Sd
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Sun Nov 30 18:57:09 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 1401
 vendor COR
xserver.version: 2:1.16.0-1ubuntu1

[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 #1249551, 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.