Public bug reported:

Binary package hint: pavucontrol

I have an analog 5.1 speakers with the Intel HDA audio (Realtek ALC662 rev1 - 
HDA ATI SB)  device.
Alsa is configured to use 5.1 speakers, in alsamixer I see the LFE regulator, 
that sets to 100%.
I have the pavucontrol (pulseaudio volume control) tool that can chage the 
pulseadio configuration

When i set the pulseadio to any 5.1 in Profile selectlist, I hear the sound, 
can control volume of each speaker.
When I looking any video with 5.1 sound, I hear the sound normally, with using 
LFE "Low Frequency Effects".
But when I listen the stereo (2-channel) music, I hear nothing in LFE speaker!!
If I set the pulseadio profile  to "Analog stereo", I hear the sound from it, 
but when I goes back to any 5.1 profile, the LFE goes off.

And I didn't see the "Low Frequency Effects" volume regulator in the device, I 
see strange string "Rear center".
Here is my pulseadio settings screenshots:
http://yfrog.com/9fsnapshot1ip
http://yfrog.com/bhsnapshot2qp
http://yfrog.com/j7snapshot3lp

How I can bring the LFE work when playing 2-channel music?

ProblemType: Bug
Architecture: amd64
Date: Sun Nov 22 13:10:07 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: fglrx
Package: pavucontrol 0.9.8+git20090701-0ubuntu2
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: pavucontrol
Uname: Linux 2.6.31-14-generic x86_64
XsessionErrors:
 (polkit-gnome-authentication-agent-1:21137): GLib-CRITICAL **: 
g_once_init_leave: assertion `initialization_value != 0' failed
 (npviewer.bin:15135): Gtk-WARNING **: 
/usr/lib/gtk-2.0/2.10.0/engines/libqtcurve.so: wrong ELF class: ELFCLASS64
 (npviewer.bin:31986): Gtk-WARNING **: 
/usr/lib/gtk-2.0/2.10.0/engines/libqtcurve.so: wrong ELF class: ELFCLASS64
 (npviewer.bin:8461): Gtk-WARNING **: 
/usr/lib/gtk-2.0/2.10.0/engines/libqtcurve.so: wrong ELF class: ELFCLASS64

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


** Tags: amd64 apport-bug lfe pulseaudio sound

-- 
Pulseaudio didn't play to the "Low Frequency Effects" (LFE) channel via "Analog 
Surround 5.1 output"
https://bugs.launchpad.net/bugs/486602
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