How to activate subwoofer in Inspiron 17r?
On this answer: https://askubuntu.com/a/481831/307523, I found this comment I wrote last year: March 5, 2017 - Just to confirm this activates the sub-woofer for the Dell Inspiron 17R 7720 SE in Ubuntu 16.04.
Firstly you will need to install alsa-tools & alsa-tools-gui from either the software center or from terminal.
sudo apt-get install alsa-tools alsa-tools-gui
Open HDAJackRetask
Select the IDT 92HD91BXX codec
Check the “Show unconnected pins” box (the internal speakers do not show as connected)
- Remap 0x0d (Internal Speaker, which is your Front side) to Internal speaker.
- Remap 0×10 (“Not connected”, which is the subwoofer) to “Internal speaker (LFE)”
Select “Install boot override” to save the settings to apply at boot time. Reboot. When it comes back, you should have full sound from all speakers.
Note: Option 2. was removed due to new testing by alfC. It used to say:
- Remap 0x0f (“Not connected”, which is the under-display speakers) to “Internal speaker”
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.
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.
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.