Public bug reported:

After upgrading to Ubuntu 13.10, selecting HDMI as audio output device
is broken.

Audio is played back at high speed. When playing back video clips, the
video frames are also too fast.

This is similar to an old bug I reported some time ago,
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/897008 . In that
case, adding radeon.audio=1 to the kernel command line solved.

Now, the configuration is unchanged since when Ubuntu 13.04 was running

$cat /proc/cmdline 
BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic 
root=UUID=10b9da6b-d735-48a7-bc45-2c1fc81183dd ro quiet splash radeon.audio=1 
vt.handoff=7

yet audio is broken.

Note that, when selecting headphone as audio output device, everything
works.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-control-center 1:3.6.3-0ubuntu44
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Sun Oct 27 18:00:53 2013
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2010-11-07 (1085 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to saucy on 2013-10-22 (5 days ago)
usr_lib_gnome-control-center:
 activity-log-manager          0.9.7-0ubuntu4
 deja-dup                      27.3.1-0ubuntu1
 gnome-control-center-datetime 13.10.0+13.10.20131016.2-0ubuntu1
 gnome-control-center-signon   0.1.7~+13.10.20130724.1-0ubuntu1
 gnome-control-center-unity    1.3+13.10.20131004-0ubuntu1

** Affects: gnome-control-center (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug hdmi saucy

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https://bugs.launchpad.net/bugs/1245226

Title:
  HDMI: audio-video playback too fast

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