Xorg crashed with SIGABRT in raise()

[ZhengJianhui]

What I had done:
1. I upgrade from 13.04 to 13.10. When the upgrade finished, i reboot my compu'ter. I can't see anything on the monitor, but I hear the "log in" sound. I know the system stop on the log in screen. But the monitor's brightness is 0 or less.
2. I enforce the system to reboot by press the power button. Then I went to the "recovery mode", I run this command in the terminal as the root user:
apt-get remove fglrx*
shutdown -r 0
3.The computer reboot, but the system stop on the purple screen. I forced the computer reboot by pressing the power button.
4. I get it power on using the normal boot, not the recovery mode. And Ubuntu boot normally. But about 3 minutes after I log in, this "bug" occur.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: xserver-xorg-core 2:1.13.3-0ubuntu13
ProcVersionSignature: Ubuntu 3.10.0-0.7-generic 3.10.0-rc7
Uname: Linux 3.10.0-0-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.10.2-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Sat Jun 29 20:53:17 2013
DistUpgraded: 2013-06-29 20:13:42,157 DEBUG enabling apt cron job
DistroCodename: saucy
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.2.10, 3.10.0-0-generic, x86_64: installed
 virtualbox, 4.2.10, 3.8.0-21-generic, x86_64: installed
ExecutablePath: /usr/bin/Xorg
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] [1002:6760] (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Radeon HD 7470M [1043:2002]
InstallationDate: Installed on 2013-04-26 (63 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: ASUSTeK Computer Inc. K54HR
MarkForUpload: True
ProcCmdline: /usr/bin/X :0 -core -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background none
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.10.0-0-generic root=UUID=7c50c9c1-c61d-4008-a912-596f21cd6348 ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 OsAbort ()
 ?? ()
 FatalError ()
Title: Xorg crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to saucy on 2013-06-29 (0 days ago)
UserGroups:

dmi.bios.date: 06/20/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: K54HR.205
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: K54HR
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrK54HR.205:bd06/20/2012:svnASUSTeKComputerInc.:pnK54HR:pvr1.0:rvnASUSTeKComputerInc.:rnK54HR:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: K54HR
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.45-2ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.3-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.3-0ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu13
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.8-0ubuntu1
xserver.bootTime: Sat Jun 29 20:59:12 2013
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs: Output HDMI-0 LVDS VGA-0
xserver.version: 2:1.13.3-0ubuntu13
xserver.video_driver: radeon

[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 #1188123, 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.