Public bug reported:

Well, I've just Installed Ubuntu and I can't get any sound from either
my internal sound card that comes with my Macpro or from my external
audio card that is a Rosetta 800 from Apogee.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24
Uname: Linux 3.2.0-29-generic-pae i686
NonfreeKernelModules: nvidia wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  filipe     2444 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x8b720000 irq 65'
   Mixer name   : 'Realtek ALC889A'
   Components   : 'HDA:10ec0885,106b4200,00100103'
   Controls      : 24
   Simple ctrls  : 10
Card1.Amixer.info:
 Card hw:1 'U49'/'M-Audio USB Axiom 49 at usb-0000:00:1a.0-2, full speed'
   Mixer name   : 'USB Mixer'
   Components   : 'USB0763:0199'
   Controls      : 0
   Simple ctrls  : 0
Card1.Amixer.values:
 
Date: Mon Sep  3 19:53:06 2012
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 
(20120817.3)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
 2444  filipe    F.... pulseaudio
     PID ACCESS COMMAND
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [MacPro4,1, Realtek ALC889A, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/13/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MP41.88Z.0081.B07.0910130729
dmi.board.asset.tag: 0
dmi.board.name: Mac-F221BEC8
dmi.board.vendor: Apple Inc.
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 7
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F221BEC8
dmi.modalias: 
dmi:bvnAppleInc.:bvrMP41.88Z.0081.B07.0910130729:bd10/13/09:svnAppleInc.:pnMacPro4,1:pvr0.0:rvnAppleInc.:rnMac-F221BEC8:rvr:cvnAppleInc.:ct7:cvrMac-F221BEC8:
dmi.product.name: MacPro4,1
dmi.product.version: 0.0
dmi.sys.vendor: Apple Inc.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 precise running-unity

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https://bugs.launchpad.net/bugs/1045459

Title:
  I can't hear any sound coming out from the internal
  speakers[MacPro4,1, Realtek ALC889A, Speaker, Internal] No sound at
  all

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