Does the crash happen often, or was it a one-time occurrence? If you can reproduce the crash, you might try creating an /etc/X11/xorg.conf file that turns off SNA (using UXA instead):
Section "Device" Identifier "Card0" Driver "intel" Option "AccelMethod" "uxa" EndSection ** Information type changed from Private to Public ** Package changed: xorg-server (Ubuntu) => xserver-xorg-video-intel (Ubuntu) ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1211711 Title: Xorg crashed with SIGABRT Status in “xserver-xorg-video-intel” package in Ubuntu: Incomplete Bug description: crashed after installing mir 0.0.9+13.10.20130813-0ubuntu1 and restart lightdm ProblemType: Crash DistroRelease: Ubuntu 13.10 Package: xserver-xorg-core 2:1.14.2-0ubuntu9 ProcVersionSignature: Ubuntu 3.11.0-1.4-generic 3.11.0-rc4 Uname: Linux 3.11.0-1-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.12-0ubuntu3 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: Tue Aug 13 13:04:51 2013 DistUpgraded: Fresh install DistroCodename: saucy DistroVariant: ubuntu ExecutablePath: /usr/bin/Xorg ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Samsung Electronics Co Ltd Device [144d:c0b6] Subsystem: Samsung Electronics Co Ltd Device [144d:c0b6] InstallationDate: Installed on 2013-08-10 (3 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130810) MachineType: SAMSUNG ELECTRONICS CO., LTD. 300V3Z/300V4Z/300V5Z MarkForUpload: True ProcCmdline: /usr/bin/X -core :0 -auth /var/run/lightdm/root/:0 -mir 0 -mirSocket /tmp/mir_socket -nolisten tcp ProcEnviron: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-1-generic.efi.signed root=UUID=56ffd97b-1c04-4dc1-8b51-ab8755bd4708 ro quiet splash vt.handoff=7 Signal: 6 SourcePackage: xorg-server StacktraceTop: ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so ?? () ?? () ?? () Title: Xorg crashed with SIGABRT UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: dmi.bios.date: 09/25/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 05FU dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 300V3Z/300V4Z/300V5Z dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr05FU:bd09/25/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn300V3Z/300V4Z/300V5Z:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn300V3Z/300V4Z/300V5Z:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 300V3Z/300V4Z/300V5Z dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu4 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.46-1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.4-0ubuntu8 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.4-0ubuntu8 version.xserver-xorg-core: xserver-xorg-core 2:1.14.2-0ubuntu9 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.12-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.8-0ubuntu3 xserver.bootTime: Tue Aug 13 13:06:22 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: xserver.version: 2:1.14.2-0ubuntu9 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1211711/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp