Public bug reported:

Binary package hint: unity

After updating to unity 3.6.6, the launcher sometimes fails to render
itself properly which looks like like visual tearing. Hovering the
pointer over the launcher restores it to original state and
icons/quicklists are clickable. Move the pointer out again and the
launcher goes bad.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.6.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.35-generic-pae 2.6.38
Uname: Linux 2.6.38-7-generic-pae i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins: 
[core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes: 
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 640x480
 edid-base64: 
AP///////wAw5GYCAAAAAAATAQOAIhN4CpRlm5tVliYPUFQAAAABAQEBAQEBAQEBAQEBAQEBEhtWeFAADjAgICQAWMIQAAAZEhtWeFAADjAgICQAWMIQAAAZAAAA/gAxSzBSMoAxNTZXSDIKAAAAAAD//////////wEBCiAgAHA=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes: 
 edid-base64:
Date: Fri Mar 18 16:54:14 2011
DistUpgraded: Log time: 2011-03-12 03:10:01.977717
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 5.100.82.38+bdcom, 2.6.38-6-generic-pae, i686: installed 
 bcmwl, 5.100.82.38+bdcom, 2.6.38-7-generic-pae, i686: installed
GraphicsCard:
 ATI Technologies Inc M96 [Mobility Radeon HD 4650] [1002:9480] (prog-if 00 
[VGA controller])
   Subsystem: Dell Device [1028:0447]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
InstallationMedia__: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
MachineType: Dell Inc. Inspiron N5010
ProcEnviron:
 LANGUAGE=en_IN:en
 LANG=en_IN
 LC_MESSAGES=en_IN.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic-pae 
root=UUID=59ed1fcb-b99f-4602-a12b-46832b522d49 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-7.35-generic-pae 2.6.38
ProcVersionSignature__: Ubuntu 2.6.38-7.35-generic-pae 2.6.38
Renderer: Unknown
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-03-12 (6 days ago)
dmi.bios.date: 10/19/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0FCVWR
dmi.board.vendor: Dell Inc.
dmi.board.version: A09
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A09
dmi.modalias: 
dmi:bvnDellInc.:bvrA09:bd10/19/2010:svnDellInc.:pnInspironN5010:pvrA09:rvnDellInc.:rn0FCVWR:rvrA09:cvnDellInc.:ct8:cvrA09:
dmi.product.name: Inspiron N5010
dmi.product.version: A09
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4-0ubuntu7
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20110107+b795ca6e-0ubuntu5

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug compiz-0.9 i386 natty running-unity ubuntu unity-2d

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https://bugs.launchpad.net/bugs/737476

Title:
  Visual Tearing/Rendering Issues with Unity Launcher

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