Public bug reported:

In PRECISE unity-2d-launcer do not show up and uses 100% on CPU.

$ unity-2d-launcher

unity-2d-launcher: [DEBUG] bool KeyMonitor::registerEvents(): Could not open 
device:  Virtual core pointer 
unity-2d-launcher: [DEBUG] bool KeyMonitor::registerEvents(): Could not open 
device:  Virtual core keyboard 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Alt+F1" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Alt+F2" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+0" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+0" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+1" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+1" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+2" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+2" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+3" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+3" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+4" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+4" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+5" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+5" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+6" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+6" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+7" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+7" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+8" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+8" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+9" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+Shift+9" 
unity-2d-launcher: [DEBUG] static void 
WindowImageProvider::activateComposite(): Server supports the Composite 
extension (ver 0.4)
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+S" 
unity-2d-launcher: [DEBUG] virtual void Hotkey::connectNotify(const char*): 
Grabbing hotkey "Meta+T" 
unity-2d-launcher: [WARNING] virtual QImage 
BlendedImageProvider::requestImage(const QString&, QSize*, const QSize&): 
BlendedImageProvider: failed to load image from file: 
"/usr/share/unity-2d/launcher/file:///usr/share/backgrounds/contest/background-1.xml"
 
unity-2d-launcher: [WARNING] 
file:///usr/lib/qt4/imports/Unity2d/GnomeBackground.qml:56:5: QML Image: Failed 
to get image from provider: 
image://blended/file:///usr/share/backgrounds/contest/background-1.xmlcolor=blackalpha=0.66

unity-2d-launcher: [WARNING] X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 18 (X_ChangeProperty)
  Resource id:  0x0

Probably X error? I also have Xorg Edgers repository enabled.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity-2d-launcher 4.12.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-7.13-generic 3.2.0-rc7
Uname: Linux 3.2.0-7-generic i686
ApportVersion: 1.90-0ubuntu1
Architecture: i386
Date: Thu Jan  5 17:06:04 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
SourcePackage: unity-2d
UpgradeStatus: Upgraded to precise on 2012-01-05 (0 days ago)

** Affects: unity-2d (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 precise running-unity

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https://bugs.launchpad.net/bugs/912335

Title:
  [PRECISE] Unity-2d-launcher uses 100% CPU and doesn't pop-up launcher
  menu

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