I'll close the bug then. thanks for letting us know.

** Changed in: unity (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/939640

Title:
  Four finger swipe to reveal Unity Dash freezes Desktop

Status in “unity” package in Ubuntu:
  Invalid

Bug description:
  I am able to do a four-finger-swipe (on my MacBook Pro 5,2) to reveal
  the otherwise hidden Unity Launcher. It seems as though each time I
  try and do it the Desktop freezes and my CPU fan kicks in hard. I am
  unable to do anything on the Desktop but am still able to switch to a
  console where I can log in and restart the GUI from. On the console I
  see a warning message that my CPU temp is outside of the threshold.

  On the contrary, revealing the Unity Launcher using an attached mouse
  or my touchpad "normally" (i.e. without using a four finger swipe
  gesture), works perfectly.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: unity 5.4.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
  Uname: Linux 3.2.0-17-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  295.20  Mon Feb  6 21:07:30 
PST 2012
   GCC version:  gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-14ubuntu2)
  .tmp.unity.support.test.0:
   
  ApportVersion: 1.92-0ubuntu1
  Architecture: amd64
  CompizPlugins: 
[core,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
  CompositorRunning: compiz
  Date: Thu Feb 23 10:35:20 2012
  DistUpgraded: Log time: 2012-01-31 06:52:50.449673
  DistroCodename: precise
  DistroVariant: ubuntu
  GraphicsCard:
   NVIDIA Corporation G96 [GeForce 9600M GT] [10de:0647] (rev a1) (prog-if 00 
[VGA controller])
     Subsystem: Apple Inc. Device [106b:00b0]
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  JockeyStatus:
   kmod:wl - Broadcom STA wireless driver (Proprietary, Enabled, In use) 
[auto-install]
   xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, 
Disabled, Not in use)
   xorg:nvidia_current_updates - NVIDIA accelerated graphics driver 
(post-release updates) (Proprietary, Enabled, In use)
  MachineType: Apple Inc. MacBookPro5,2
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic 
root=UUID=cc42fd79-9a75-4ec8-af67-4a57c6824328 ro 
resume=UUID=cc42fd79-9a75-4ec8-af67-4a57c6824328 resume_offset=39045120 quiet 
splash vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: Upgraded to precise on 2012-01-31 (23 days ago)
  XorgConf:
   Section "Device"
        Identifier      "Default Device"
        Option  "NoLogo"        "True"
   EndSection
  dmi.bios.date: 05/04/09
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP52.88Z.008E.B05.0905042202
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-F2268EC8
  dmi.board.vendor: Apple Inc.
  dmi.chassis.asset.tag: Asset Tag#
  dmi.chassis.type: 8
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F2268EC8
  dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP52.88Z.008E.B05.0905042202:bd05/04/09:svnAppleInc.:pnMacBookPro5,2:pvr1.0:rvnAppleInc.:rnMac-F2268EC8:rvr:cvnAppleInc.:ct8:cvrMac-F2268EC8:
  dmi.product.name: MacBookPro5,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu4
  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 2:1.11.4-0ubuntu4
  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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