Public bug reported:

On this page:
http://blogs.msdn.com/b/b8/archive/2012/05/09/redesigning-chkdsk-and-the-new-ntfs-health-model.aspx

is this link:
http://media.ch9.ms/ch9/4af7/90f9956a-4b4b-404a-9f01-a8f4bcb34af7/CheckDiskImprovementsforWin8_high.mp4

Clicking on it blanks the window except for the normal set of media
controls except that they are *at the top* of the window except at the
bottom as usual.

Clicking on the Caret in the upper right of the screen and selecting
Full Screen shows the video and the audio properly.  In Full Screen
mode, of course...

On my wife's Maverick computer with FF 11, the video plays but not the
audio.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: firefox 12.0+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  ron       17788 F.... pulseaudio
 /dev/snd/controlC2:  ron       17788 F.... pulseaudio
 /dev/snd/controlC0:  ron       17788 F.... pulseaudio
BuildID: 20120423122928
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not 
found.
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
   Mixer name   : 'Realtek ALC889A'
   Components   : 'HDA:10ec0885,1458a002,00100101'
   Controls      : 48
   Simple ctrls  : 22
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xfcffc000 irq 19'
   Mixer name   : 'Nvidia GPU 0b HDMI/DP'
   Components   : 'HDA:10de000b,10de0101,00100200'
   Controls      : 24
   Simple ctrls  : 4
Card2.Amixer.info:
 Card hw:2 'Device'/'Elite Silicon USB Audio Device at usb-0000:00:12.1-1, full 
speed'
   Mixer name   : 'USB Mixer'
   Components   : 'USB18c3:6255'
   Controls      : 4
   Simple ctrls  : 3
Channel: release
Date: Sat May 12 17:29:41 2012
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Old Location Bar - 
ID={3205B348-523A-4fac-9BC4-9939CBF583B0}, Version=2.1.6, minVersion=3.0, 
maxVersion=11.*, Location=app-profile, Type=extension, Active=Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
IpRoute:
 default via 192.168.1.1 dev eth0  proto static 
 169.254.0.0/16 dev eth0  scope link  metric 1000 
 192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.10  metric 1
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=12.0/20120423122928 (Running)
RfKill:
 
RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog: May 12 08:55:07 haggis kernel: [598417.037031] ptrace of non-child 
pid 21143 was attempted by: wineserver (pid 21106)
dmi.bios.date: 10/08/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F5
dmi.board.name: GA-MA780G-UD3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd10/08/2009:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA780G-UD3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA780G-UD3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-MA780G-UD3H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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


** Tags: amd64 apport-bug precise release-channel

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https://bugs.launchpad.net/bugs/998569

Title:
  Embedded MP4 only plays audio in browser window

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