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[TEN <1203520@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Ubuntu 12.04 LTS Precise Pangolin freezes most of the time when trying
to use HDMI audio (in particular from google-talkplugin, mplayer, vdr-
sxfe, vlc, xine) up to and including the current Kernel 3.2.0-49 without
putting snd_hda_codec_hdmi on the /etc/modprobe.d/blacklist-oss.conf
(thereby losing sound over the Nvidia outputs).

Invoking pavucontrol with  snd_hda_codec_hdmi loaded almost always
results in a crash that makes even Ctrl-Alt-SysRq inaccessible.

Freezes also occurred with both hw and plughw devices of the Nvidia
HDMIs under ALSA when pulseaudio had been uninstalled for testing.

According to
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173769 #3 there is
"a kernel issue which most likely is to happen with Nvidia graphics",
this is also not fixed by using https://code.launchpad.net/~ubuntu-
audio-dev/+archive/alsa-daily/+files/oem-audio-hda-daily-
dkms_0.201307180553%7Eprecise1_all.deb according to
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1169984 #16.

New bug as identified by David Henningsson (diwic) to have different
causes than https://bugs.launchpad.net/ubuntu-desktop-tests/+bug/1169984
at #119 et seq.

Blacklisting is the supposed fix in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181616 and
http://lists.debian.org/debian-kernel/2012/05/msg00110.html but not the
solution if HDMI audio is needed.

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

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https://bugs.launchpad.net/bugs/1203520

Title:
  snd_hda_codec_hdmi (via pavucontrol or applications playing sound)
  freezes Ubuntu 12.04 LTS

Status in “linux” package in Ubuntu:
  New

Bug description:
  Ubuntu 12.04 LTS Precise Pangolin freezes most of the time when trying
  to use HDMI audio (in particular from google-talkplugin, mplayer, vdr-
  sxfe, vlc, xine) up to and including the current Kernel 3.2.0-49
  without putting snd_hda_codec_hdmi on the /etc/modprobe.d/blacklist-
  oss.conf (thereby losing sound over the Nvidia outputs).

  Invoking pavucontrol with  snd_hda_codec_hdmi loaded almost always
  results in a crash that makes even Ctrl-Alt-SysRq inaccessible.

  Freezes also occurred with both hw and plughw devices of the Nvidia
  HDMIs under ALSA when pulseaudio had been uninstalled for testing.

  According to
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173769 #3 there
  is "a kernel issue which most likely is to happen with Nvidia
  graphics", this is also not fixed by using https://code.launchpad.net
  /~ubuntu-audio-dev/+archive/alsa-daily/+files/oem-audio-hda-daily-
  dkms_0.201307180553%7Eprecise1_all.deb according to
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1169984 #16.

  New bug as identified by David Henningsson (diwic) to have different
  causes than https://bugs.launchpad.net/ubuntu-desktop-
  tests/+bug/1169984 at #119 et seq.

  Blacklisting is the supposed fix in
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181616 and
  http://lists.debian.org/debian-kernel/2012/05/msg00110.html but not
  the solution if HDMI audio is needed.

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