Public bug reported:

When using the touchpad on a Dell Vostro laptop  the mouse over effects
fail to display, however clicking on the option has the desired effect.
This also affects the scroll overlay which "blinks" making it nearly
impossible to use.

However the issue is resolved when an external pointing device is
connected, but returns after disconnect.

Tweaking the touchpad settings in the control panel has no effect on the
issue.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+10ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
.tmp.unity.support.test.0:
 
ApportVersion: 1.94.1-0ubuntu1
Architecture: i386
CheckboxSubmission: ba9c4255a69726424c6447d1c48d6601
CheckboxSystem: d00f84de8a555815fa1c4660280da308
CompizPlugins: 
[core,bailer,detection,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 Mar  8 09:30:48 2012
DistUpgraded: Log time: 2012-02-20 17:31:15.310318
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.1.8, 3.2.0-17-generic-pae, i686: installed
 virtualbox, 4.1.8, 3.2.0-18-generic-pae, i686: installed
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 NVIDIA Corporation GT218 [GeForce 310M] [10de:0a75] (rev a2) (prog-if 00 [VGA 
controller])
   Subsystem: Dell Device [1028:0440]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120201.1)
MachineType: Dell Inc. Vostro 3400
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic-pae 
root=UUID=8a0264c4-a13b-4371-8568-c0a213e10806 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to precise on 2012-02-21 (16 days ago)
dmi.bios.date: 02/10/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A01
dmi.board.name: 0RXV7H
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: 
dmi:bvnDellInc.:bvrA01:bd02/10/2010:svnDellInc.:pnVostro3400:pvrNotSpecified:rvnDellInc.:rn0RXV7H:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Vostro 3400
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu5
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu5
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

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


** Tags: apport-bug compiz-0.9 i386 precise regression reproducible ubuntu

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https://bugs.launchpad.net/bugs/950036

Title:
  Touchpad does not trigger mouseover events.

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