Flash does not respond with a click of your mouse

[filorin]

Log in to an Ubuntu 3D session. Then open a Web Browser like the default Browser Firefox (flashplayer-plugin must be installed). Go to this website : http://www.un-miroir.com/ and, then, let Flash ask you the autorisation to use your Webcam or your mike. It freezes automatically.
Notice : It works well with Ubuntu 2D, Gnome Shell, gnome-session-with-no-effect but not with Ubuntu-Session-Fallback.

It was already detected before ( in 2009 ), and fix released, it's a bad regression : https://bugs.launchpad.net/ubuntu/+source/flashplugin-nonfree/+bug/410407?comments=all

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: flashplugin-installer
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Wed May 16 22:25:17 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: flashplugin-nonfree
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Coeur Noir (coeur-noir)]

It works also well with gnome-fallback-with-no-effects.

Is Compiz troubleshooting with flash ?

[Daniel van Vugt (vanvugt)]

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 865672, 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.