*** This bug is a duplicate of bug 1382677 *** https://bugs.launchpad.net/bugs/1382677
The succesfull workaround for Xorg crashing on Intel GM45 integrated graphics on Lenovo T400 was to create the the following file /usr/share/X11/xorg.conf.d/20-intel-gm45.conf Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "uxa" EndSection Swtiching from SNA to UXA alleviated all the problems. As a side note, gtkperf tool is very reliable to reproduce SNA Xorg crashes. ** This bug has been marked a duplicate of bug 1382677 Xorg crashed with SIGABRT in __GI___libc_free() -- 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/1383449 Title: Xorg crashed with signal 7 in start_thread() Status in “xorg-server” package in Ubuntu: New Bug description: Tried to use gdb to catch it, however the virtual ttys are blacked out, not frozen, thus could not do anything with it. If someone can give me a practical advice on how to back-trace Xorg, I could help to troubleshoot it. ProblemType: Crash DistroRelease: Ubuntu 14.04 Package: xserver-xorg-core 2:1.15.1-0ubuntu2.1 ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7 Uname: Linux 3.5.0-18-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.5 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 CrashCounter: 1 Date: Mon Oct 20 12:28:56 2014 DistUpgraded: 2014-08-19 14:00:57,964 DEBUG enabling apt cron job DistroCodename: trusty DistroVariant: ubuntu ExecutablePath: /usr/bin/Xorg ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:20e4] Subsystem: Lenovo Device [17aa:20e4] InstallationDate: Installed on 2012-06-22 (850 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 647341U PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcCmdline: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch ProcEnviron: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=cc4e5011-50ff-4db4-856e-d1ef85ab4327 ro crashkernel=384M-:128M Signal: 7 SourcePackage: xorg-server StacktraceTop: ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so start_thread (arg=0x7f5a1f2ac700) at pthread_create.c:312 Title: Xorg crashed with signal 7 in start_thread() UpgradeStatus: Upgraded to trusty on 2014-08-19 (61 days ago) UserGroups: dmi.bios.date: 10/10/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 7VET95WW (3.25 ) dmi.board.name: 647341U dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr7VET95WW(3.25):bd10/10/2012:svnLENOVO:pn647341U:pvrThinkPadT400:rvnLENOVO:rn647341U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 647341U dmi.product.version: ThinkPad T400 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.2 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Mon Oct 20 12:29:04 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 16437 vendor LEN xserver.version: 2:1.15.1-0ubuntu2.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1383449/+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