It happend for me as well, but I got a segfault. I attach my logfile. Unity is running, up-to-date 12.10. Machine was upgraded a couple of times and suspsened/resumed a bunch of times too.
** Attachment added: "Xorg.0.log.old" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1060059/+attachment/3401219/+files/Xorg.0.log.old -- 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/1060059 Title: Xorg crashed with SIGABRT in ResFindAllRes() Status in “xorg-server” package in Ubuntu: Triaged Status in “xorg-server” source package in Quantal: Triaged Bug description: Crashed as soon as xrestop is run ProblemType: Crash DistroRelease: Ubuntu 12.10 Package: xserver-xorg-core 2:1.13.0-0ubuntu5 ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4 Uname: Linux 3.5.0-16-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.5.3-0ubuntu1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CrashCounter: 1 Date: Tue Oct 2 17:43:30 2012 DistUpgraded: Fresh install DistroCodename: quantal DistroVariant: ubuntu ExecutablePath: /usr/bin/Xorg ExecutableTimestamp: 1348785641 GraphicsCard: Advanced Micro Devices [AMD] nee ATI RV730XT [Radeon HD 4670] [1002:9490] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:21b2] InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120905.2) MachineType: Gigabyte Technology Co., Ltd. GA-MA780G-UD3H ProcCmdline: /usr/bin/X :0 -core -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background none ProcCwd: /etc/X11 ProcEnviron: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-16-generic root=UUID=e9e28db6-3c36-4e13-bea1-017b97bd28d8 ro quiet splash vt.handoff=7 Signal: 6 SourcePackage: xorg-server StacktraceTop: ?? () FindAllClientResources () ?? () ?? () ?? () Title: Xorg crashed with SIGABRT in FindAllClientResources() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: dmi.bios.date: 12/30/2008 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F1 dmi.board.name: GA-MA780G-UD3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd12/30/2008:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA780G-UD3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA780G-UD3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-MA780G-UD3H dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.8.2+bzr3377-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.39-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120917.7cfd42ce-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120917.7cfd42ce-0ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu5 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1060059/+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