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I have a Dell Inspiron 17r, after a fresh install of 12.10, the subwoofer seems to be not utilized. No sound comes from it and in the Sound Control Panel the settings appear grayed out (see screenshot). How can I activate the subwoofer?

no subwoofer

I tried adding the line

options snd-hda-intel model=dell

in the file /etc/modprobe.d/alsa-base.conf and

enable-lfe-remixing = yes
default-sample-channels = 3

in the file /etc/pulse/daemon.conf, but still doesn't work.

EDIT: related question: Subwoofer doesn't work on Dell Inspiron 17R after upgrade to 13.10

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A promising change to the sound config has been posted here: linuxsagas.digitaleagle.net/2012/11/23/sound-for-inspiron-17r/…, although it doesn't solve the problem yet. –  alfC Nov 23 '12 at 21:07
A possible test audio sample test: youtube.com/watch?v=PC7WEQsiz08 –  alfC Jan 13 at 20:33

3 Answers 3

I'm not sure this completely answers the question, but maybe it gets 90% there...

First, edit the following file:

sudo gedit /etc/pulse/daemon.conf

Uncommment and change the values of these lines:

enable-lfe-remixing = yes
default-sample-channels = 3
default-channel-map = front-left,front-right,lfe

Second, edit the following file:

sudo gedit /etc/pulse/default.pa

Add the following line to the end:

load-module module-combine channels=3 channel_map=front-left,front-right,lfe

At this point, I hear noise from the Subwoofer in the Test Sound option under the volume control. I can't tell that it comes from the subwoofer though. Maybe this is the way it is supposed to work.

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this exactly the changes that I made before (see comments in adams answer) +1. As you say this is 90% there, the subwoofer now works although with some "chirp" sound (looks digital, not saturation). The bigger annoyance is that when earplugs are connected the subwoofer sound still goes externally. Do you know how to block the subwoofer from producing sound while earplugs are connected? –  alfC Nov 28 '12 at 18:32
Try with the line options snd-hda-intel model=ref in alsa-base.conf, this will make the static sound (and actual music) come out from the subwoofer speaker. The problem with blocking the subwoofer when headphones are connected is a standing problem. –  alfC Nov 30 '12 at 20:57
Thank you! Adding these edits got the Beats Audio subwoofer working on my HP Envy 17 1090ca! –  Jeremy Jan 19 '13 at 20:25

Try options snd-hda-intel model=ref in /etc/modprobe.d/alsa-base.conf.

Control for subwoofer doesn't work in sound settings but sound can be heard.

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In what file? what is ref? –  alfC Nov 13 '12 at 23:39
I tried the change and it doesn't change any setting in the Sound Settings window options. Also, I wouldn't know how to force to play sound with the SB since there is still no Test option. –  alfC Nov 23 '12 at 21:09
Based on this post I made some changes until one worked. It is difficult to tell what made it work but basically works now. The changes I remember doing are: in alsa-base.conf, the lines: #options snd-hda-intel model=alc269-dmic\\ options snd-hda-intel model=ref in default.pa the line: load-module module-combine channels=3 channel_map=front-left,front-right,lfe in daemoon.conf, the lines: ; enable-remixing = yes\\ enable-lfe-remixing = yes\\ default-sample-channels = 3\\ default-channel-map = front-left,front-right,lfe I'll accept this answer until figure out the exact changes. –  alfC Nov 23 '12 at 21:40
Another problem I am finding with the current configuration is that when the earplugs are connected the subwoofer still can be heard externally. –  alfC Nov 24 '12 at 9:16
This answer technically solves the problem. The problem with blocking the subwoofer when headphones are connected is a standing problem. –  alfC Nov 30 '12 at 20:54

Ok I seem to have found a working fix for it with headphones enabled in my elemntary OS luna [ with lts-raring HWE for precise]

In /etc/modprobe.d/alsa-base.conf , add :

options snd-hda-intel model=ref

now you can enable sub-woofer with command :

amixer set 'Mono Mux' DAC1

but headphone jack sensing doesnt work for sub-woofer

and you need to manual deactivate by command :

amixer set 'Mono Mux' Mixer

To Automate it acpi events could not be used , but pulseaudio configs are to be used. :

In /usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf , add the following at the bottom just before .include analog-output.conf.common

[Element Mono Mux]
enumeration = select
[Option Mono Mux:DAC1]
name = analog-output

and also in /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf , add the following at the bottom just before .include analog-output.conf.common

[Element Mono Mux]
enumeration = select
[Option Mono Mux:Mixer]
name = analog-output-headphones

After that either restart the pc or run pulseaudio -k && sudo alsa force-reload

Now check if it has worked . either by playing out a song or opening alsamixer and connecting and disconnecting the headphone .

It seems that adding options snd-hda-intel model=ref to alsa-base.conf doesn't work in Ubuntu 13.10 Saucy as pointed out in this askubuntu question. and i dont know if headphones jack sensing works if following the answer mentioned in that question or if there is chirping noise from audio , as i haven't yet installed a 13.10 saucy or lts-saucy HWE.

And also hda-jack-retask can be obtained in older versions using ppa:diwic/ppa

Hope it helped.

EDIT : Editing more confs . analog-output-speaker.conf , anolog-output-speaker-always.conf etc.. in the same manner was required.

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