** Description changed:

  this happens since the machine was updated from 20120210 to the current
  development release. Usually when switching workspaces, X crashes, and
  I'm presented with a the login manager screen.
+ 
+ #3  0x00007fea2c84f8e6 in malloc_printerr (action=3, str=0x7fea2c94d3d0 
"double free or corruption (out)", ptr=<optimized out>) at malloc.c:5007
+         buf = "00007fea2f46bd70"
+         cp = <optimized out>
+ #4  0x00007fea25cc17ad in SynapticsUnInit (drv=<optimized out>, 
pInfo=0x7fea2f47d570, flags=<optimized out>) at ../../src/synaptics.c:820
+         priv = 0x7fea2f487b20
+ #5  0x00007fea2e6d6bb9 in DeleteInputDeviceRequest (pDev=0x7fea2f4881e0) at 
../../../../hw/xfree86/common/xf86Xinput.c:1012
+         pInfo = 0x7fea2f47d570
+         drv = 0x7fea2f46b720
+         isMaster = 0
+ #6  0x00007fea2e6e3271 in remove_device (dev=0x7fea2f4881e0, 
backend=0x7fea2e7d4f1e "udev") at ../../config/config.c:84
+ No locals.
+ #7  remove_devices (backend=0x7fea2e7d4f1e "udev", config_info=0x7fea2f9fb3d0 
"udev:/sys/devices/pci0000:00/0000:00:1d.2/usb7/7-2/7-2:1.2/input/input5/event5")
 at ../../config/config.c:96
+         dev = 0x7fea2f4881e0
+         next = 0x7fea2f4a7800
+ #8  0x00007fea2e6e3cfa in device_removed (device=<optimized out>) at 
../../config/udev.c:227
+         value = 0x7fea2f9fb3d0 
"udev:/sys/devices/pci0000:00/0000:00:1d.2/usb7/7-2/7-2:1.2/input/input5/event5"
+         syspath = <optimized out>
+ 
  
  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: xserver-xorg-core 2:1.11.4-0ubuntu3
  ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
  Uname: Linux 3.2.0-16-generic x86_64
  NonfreeKernelModules: nvidia wl
  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
-  NVRM version: NVIDIA UNIX x86_64 Kernel Module  290.10  Wed Nov 16 17:39:29 
PST 2011
-  GCC version:  gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-14ubuntu1)
+  NVRM version: NVIDIA UNIX x86_64 Kernel Module  290.10  Wed Nov 16 17:39:29 
PST 2011
+  GCC version:  gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-14ubuntu1)
  .tmp.unity.support.test.0:
-  
+ 
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CrashCounter: 1
  CurrentDmesg:
-  [   21.245943] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
-  [   27.384709] init: plymouth-upstart-bridge main process (761) killed by 
TERM signal
-  [   32.248103] eth0: no IPv6 routers present
+  [   21.245943] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
+  [   27.384709] init: plymouth-upstart-bridge main process (761) killed by 
TERM signal
+  [   32.248103] eth0: no IPv6 routers present
  Date: Thu Feb 16 15:36:28 2012
  DistUpgraded: Fresh install
  DistroCodename: precise
  DistroVariant: ubuntu
  DkmsStatus:
-  bcmwl, 5.100.82.38+bdcom, 3.2.0-15-generic, x86_64: installed
-  bcmwl, 5.100.82.38+bdcom, 3.2.0-16-generic, x86_64: installed
-  nvidia-current, 290.10, 3.2.0-15-generic, x86_64: installed
-  nvidia-current, 290.10, 3.2.0-16-generic, x86_64: installed
+  bcmwl, 5.100.82.38+bdcom, 3.2.0-15-generic, x86_64: installed
+  bcmwl, 5.100.82.38+bdcom, 3.2.0-16-generic, x86_64: installed
+  nvidia-current, 290.10, 3.2.0-15-generic, x86_64: installed
+  nvidia-current, 290.10, 3.2.0-16-generic, x86_64: installed
  ExecutablePath: /usr/bin/Xorg
  GraphicsCard:
-  NVIDIA Corporation G84 [GeForce 8600M GT] [10de:0407] (rev a1) (prog-if 00 
[VGA controller])
-    Subsystem: Apple Inc. Device [106b:00a3]
+  NVIDIA Corporation G84 [GeForce 8600M GT] [10de:0407] (rev a1) (prog-if 00 
[VGA controller])
+    Subsystem: Apple Inc. Device [106b:00a3]
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64+mac 
(20120118)
  JockeyStatus:
-  kmod:nvidia_current_updates - NVIDIA binary Xorg driver, kernel module and 
VDPAU library (Proprietary, Disabled, Not in use)
-  kmod:wl - Broadcom STA wireless driver (Proprietary, Enabled, In use) 
[auto-install]
-  kmod:nvidia_173 - NVIDIA binary Xorg driver, kernel module and VDPAU library 
(Proprietary, Disabled, Not in use)
-  kmod:nvidia_173_updates - NVIDIA binary Xorg driver, kernel module and VDPAU 
library (Proprietary, Disabled, Not in use)
-  kmod:nvidia_current - nvidia_current (Proprietary, Enabled, Not in use)
+  kmod:nvidia_current_updates - NVIDIA binary Xorg driver, kernel module and 
VDPAU library (Proprietary, Disabled, Not in use)
+  kmod:wl - Broadcom STA wireless driver (Proprietary, Enabled, In use) 
[auto-install]
+  kmod:nvidia_173 - NVIDIA binary Xorg driver, kernel module and VDPAU library 
(Proprietary, Disabled, Not in use)
+  kmod:nvidia_173_updates - NVIDIA binary Xorg driver, kernel module and VDPAU 
library (Proprietary, Disabled, Not in use)
+  kmod:nvidia_current - nvidia_current (Proprietary, Enabled, Not in use)
  MachineType: Apple Inc. MacBookPro4,1
  ProcCmdline: /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 
-novtswitch
  ProcEnviron:
-  
+ 
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-16-generic 
root=UUID=c058c398-1709-4b98-bc87-c17cc7bc93c8 ro quiet splash vt.handoff=7
  Signal: 6
  SourcePackage: nvidia-graphics-drivers
  StacktraceTop:
-  raise () from /lib/x86_64-linux-gnu/libc.so.6
-  abort () from /lib/x86_64-linux-gnu/libc.so.6
-  ?? () from /lib/x86_64-linux-gnu/libc.so.6
-  ?? () from /lib/x86_64-linux-gnu/libc.so.6
-  ?? () from /usr/lib/xorg/modules/input/synaptics_drv.so
+  raise () from /lib/x86_64-linux-gnu/libc.so.6
+  abort () from /lib/x86_64-linux-gnu/libc.so.6
+  ?? () from /lib/x86_64-linux-gnu/libc.so.6
+  ?? () from /lib/x86_64-linux-gnu/libc.so.6
+  ?? () from /usr/lib/xorg/modules/input/synaptics_drv.so
  Title: Xorg crashed with SIGABRT in raise()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
-  
+ 
  XorgConf:
-  Section "Device"
-       Identifier      "Default Device"
-       Option  "NoLogo"        "True"
-  EndSection
+  Section "Device"
+   Identifier  "Default Device"
+   Option      "NoLogo"        "True"
+  EndSection
  dmi.bios.date: 02/09/08
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP41.88Z.00C1.B00.0802091544
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Mac-F42C89C8
  dmi.board.vendor: Apple Inc.
  dmi.board.version: PVT
  dmi.chassis.asset.tag: Asset Tag#
  dmi.chassis.type: 2
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F42C89C8
  dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP41.88Z.00C1.B00.0802091544:bd02/09/08:svnAppleInc.:pnMacBookPro4,1:pvr1.0:rvnAppleInc.:rnMac-F42C89C8:rvrPVT:cvnAppleInc.:ct2:cvrMac-F42C89C8:
  dmi.product.name: MacBookPro4,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.30-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 
1:2.6.99.901+git20120126-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.14.99~git20111219.aacbd629-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20111201+b5534a1-1build2

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https://bugs.launchpad.net/bugs/933504

Title:
  Xorg crashed with SIGABRT in __libc_message "double free or corruption
  (out)" from DeleteInputDeviceRequest

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