A few weeks ago I bought an Asus n76vm notebook looking forward to it's 'superior sound'. This sound system compromises an external subwoofer which amplifies bass and is connected to a special output jack. Ubuntu 12.04, however, does not detect this subwoofer. How could this be solved?
Any help would be gratefully appreciated
http://www.asus.com/Notebooks/Multimedia_Entertainment/N76VM/#specifications
to get the subwoofer
I added on the file /etc/modprobe.d/alsa-base.conf this line:
options snd-hda-intel model=asus-mode4
then rebooted and selected 2.1 output in audio pref. It should work right away :) got this information from Keyboard backlight not working on an Asus N56V
hope it helped!
Which sound card are you using?
$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
If so, I think you have a common problem with many new laptops: you are lacking the 2.1 surround mode enabled in your audio driver. Here a solution that worked for me: intel audio fix
Here are three things to do:
echo 'options snd-hda-intel model=asus-mode4' | sudo tee -a /etc/modprobe.d/alsa-base.confsudo -H gedit /usr/share/pulseaudio/alsa-mixer/profile-sets/extra-hdmi.conf
[Mapping analog-surround-21]
device-strings = surround40:%f
channel-map = front-left,front-right,lfe,lfe
paths-output = analog-output analog-output-speaker
priority = 7
direction = out
Note: On Asus N76VB running on the newer kernel 3.8.0-30, change the last line to be this instead:
direction = output
sudo -H gedit /etc/pulse/daemon.conf
enable-lfe-remixing = yes
Reboot.
You should now be able to see your "analog surround 2.1" among your possible Hardware settings in the sound menu.
"Analog Surround 4.0" is also working but changes the loudness from Front to Rear.
Additionally you can install the GNOME alsa mixer to boot your basses.
