Switching windows with alt-tab leaves no window focused

[Juan Montoya]

Pressing alt-tab to switch to the last window sometimes leaves no window focused.
It may be because I have a slow computer (Celeron at 1.7Ghz) but about 30% of the time when I switch window I end up with no window focused.

I believe it happens if alt is released just before the tab switcher is appearing.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.6.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
Uname: Linux 3.5.0-15-generic i686
.tmp.unity.support.test.0:

ApportVersion: 2.6.1-0ubuntu1
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Wed Oct 3 18:59:51 2012
DistUpgraded: Fresh install
DistroCodename: quantal
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0106] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: COMPAL Electronics Inc Device [14c0:005a]
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta i386 (20120926)
Lsusb:
 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 003: ID 064e:f245 Suyin Corp.
MachineType: Compal PBL10
ProcEnviron:
 LANGUAGE=es_PE:es
 TERM=xterm
 PATH=(custom, no user)
 LANG=es_PE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-15-generic root=UUID=ba31d793-e203-4862-87a9-0981eb9f79b5 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/20/2012
dmi.bios.vendor: INSYDE
dmi.bios.version: 2.80
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: PBL10
dmi.board.vendor: Compal
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Compal
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr2.80:bd04/20/2012:svnCompal:pnPBL10:pvr2.80:rvnCompal:rnPBL10:rvrBaseBoardVersion:cvnCompal:ct10:cvrChassisVersion:
dmi.product.name: PBL10
dmi.product.version: 2.80
dmi.sys.vendor: Compal
version.compiz: compiz 1:0.9.8.4-0ubuntu1
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120917.7cfd42ce-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120917.7cfd42ce-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu2

[Edward Donovan (edward.donovan)]

 Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1035628, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.