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I've a "Dell Inspiron 660" desktop PC with Ubuntu 12.10 and Subwoofer is not working.

This is the Audio device that have:

00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
01:00.1 Audio device: NVIDIA Corporation Device 0e1b (rev a1)

In Sound Settings I see this:

enter image description here

I have tried to google for this problem and I have seen that other people just added these lines to /etc/pulse/daemon.conf

enable-remixing = yes
enable-lfe-remixing = yes
default-sample-channels = 6

but it didn't work for me (I of course restarted pulseaudio: sudo service pulseaudio restart).

Anyone knows how to fix this? Thank you so much!

I add more verbose informations about my audio device, I hope it can help:

00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
    Subsystem: Dell Device 0581
    Flags: bus master, fast devsel, latency 0, IRQ 46
    Memory at f7910000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [50] Power Management version 2
    Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
    Capabilities: [100] Virtual Channel
    Capabilities: [130] Root Complex Link
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd-hda-intel


01:00.1 Audio device: NVIDIA Corporation Device 0e1b (rev a1)
    Subsystem: NVIDIA Corporation Device 093d
    Flags: bus master, fast devsel, latency 0, IRQ 17
    Memory at f7080000 (32-bit, non-prefetchable) [size=16K]
    Capabilities: [60] Power Management version 3
    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [78] Express Endpoint, MSI 00
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd-hda-intel
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