Alt+Tab do not properly switch between currently-open windows

[Prateek Dwivedi]

When I use Alt+Tab while working in Application A to switch to Application B, it does not switch properly. The window of Application B appears, but I need to manually click on the window before I could start working on it. In vague technical terms, I can say that the focus remains with Application A while I have already switched to Application B using the hotkey.

I started facing this problem from the time I have updated Ubuntu from 16.04.2 LTS to 17.04.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: unity 7.5.0+17.04.20170407.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-21.23-generic 4.10.11
Uname: Linux 4.10.0-21-generic x86_64
NonfreeKernelModules: wl
.tmp.unity_support_test.0:

ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity:Unity7
Date: Wed May 31 09:21:31 2017
DistUpgraded: 2017-04-19 18:28:34,070 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process "./xorg_fix_proprietary.py" (No such file or directory) (8))
DistroCodename: zesty
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.271+bdcom, 4.10.0-19-generic, x86_64: installed
 bcmwl, 6.30.223.271+bdcom, 4.10.0-20-generic, x86_64: installed
 bcmwl, 6.30.223.271+bdcom, 4.10.0-21-generic, x86_64: installed
 bcmwl, 6.30.223.271+bdcom, 4.8.0-22-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 2nd Generation Core Processor Family Integrated Graphics Controller [17aa:5000]
InstallationDate: Installed on 2017-04-11 (50 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
MachineType: LENOVO 32592D4
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-21-generic.efi.signed root=UUID=06033afc-adb4-49a3-8e7f-772565628f69 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to zesty on 2017-04-19 (41 days ago)
dmi.bios.date: 02/27/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: H0ET91WW (2.51 )
dmi.board.asset.tag: Not Available
dmi.board.name: 32592D4
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrH0ET91WW(2.51):bd02/27/2013:svnLENOVO:pn32592D4:pvrThinkPadEdgeE530:rvnLENOVO:rn32592D4:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 32592D4
dmi.product.version: ThinkPad Edge E530
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.1+17.04.20170109-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.76-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.3-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.3-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.14-0ubuntu1
xserver.bootTime: Wed May 31 09:09:26 2017
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.3-1ubuntu1
xserver.video_driver: modeset