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[TEN <1203520@xxxxxxxxxxxxxxxxxx>]

Launching pavucontrol may still freeze the system, hence
snd_hda_codec_hdmi has to be blacklisted (losing its required
functionality), also under kernel 3.8.0-30 and even after a BIOS update
to 1.32 (irrevocable, cf.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1203446/+attachment/3809189/+files/HPQFlash.png).

$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
786F1 v01.32
07/21/2011

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

Title:
  10de:1040 snd_hda_codec_hdmi (via pavucontrol or applications playing
  sound) freezes Ubuntu 12.04 LTS

Status in “linux” package in Ubuntu:
  Incomplete

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.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.3
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  user       2378 F.... pulseaudio
   /dev/snd/controlC1:  user       2378 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf3120000 irq 45'
     Mixer name	: 'Analog Devices AD1884'
     Components	: 'HDA:11d41884,103c2819,00100100'
     Controls      : 31
     Simple ctrls  : 19
  Card1.Amixer.info:
   Card hw:1 'SAA7134'/'saa7134[0] at 0xf3200000 irq 22'
     Mixer name	: 'SAA7134 Mixer'
     Components	: ''
     Controls      : 6
     Simple ctrls  : 3
  Card2.Amixer.info:
   Card hw:2 'NVidia'/'HDA NVidia at 0xf3000000 irq 17'
     Mixer name	: 'Nvidia ID 1c'
     Components	: 'HDA:10de001c,14628097,00100100'
     Controls      : 0
     Simple ctrls  : 0
  Card2.Amixer.values:
   
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=b779581c-49c5-4cca-8cac-3d2b5243b6ee
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Hewlett-Packard HP Compaq dc7800p Convertible Minitower
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-48-generic-pae root=UUID=967f80d1-798e-4c04-bb4c-935f35d7397b ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-48.74-generic-pae 3.2.46
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-48-generic-pae N/A
   linux-backports-modules-3.2.0-48-generic-pae  N/A
   linux-firmware                                1.79.4
  RfKill:
   0: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no
  StagingDrivers: mei
  Tags:  precise staging
  Uname: Linux 3.2.0-48-generic-pae i686
  UnreportableReason: Your home partition has less than 3 MB of free space available, which leads to problems using applications and installing updates. Please free some space.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 07/18/2007
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786F1 v01.04
  dmi.board.asset.tag: CZC8277VRK
  dmi.board.name: 0AACh
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CZC8277VRK
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786F1v01.04:bd07/18/2007:svnHewlett-Packard:pnHPCompaqdc7800pConvertibleMinitower:pvr:rvnHewlett-Packard:rn0AACh:rvr:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Compaq dc7800p Convertible Minitower
  dmi.sys.vendor: Hewlett-Packard

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