2.1 audio not working in Kubuntu 13.10

[Guest]

Dear friends,



I have a Dell L702X laptop which comes with a 2.1 sound configuration - 2 speakers + subwoofer from JBL. Sound is suberb in Windows, but I can't get the subwoofer to work in Linux!





Here's the information I think you need:


~$ aplay -l
**** Lista de Dispositivos PLAYBACK Hardware ****
placa 0: PCH [HDA Intel PCH], dispositivo 0: ALC665 Analog [ALC665 Analog]
Dispositivo secundário: 1/1
Dispositivo secundário #0: subdevice #0
placa 0: PCH [HDA Intel PCH], dispositivo 1: ALC665 Digital [ALC665 Digital]
Dispositivo secundário: 1/1
Dispositivo secundário #0: subdevice #0
placa 0: PCH [HDA Intel PCH], dispositivo 3: HDMI 0 [HDMI 0]
Dispositivo secundário: 1/1
Dispositivo secundário #0: subdevice #0




~$ aplay -L
default
Playback/recording through the PulseAudio sound server
sysdefault:CARD=PCH
HDA Intel PCH, ALC665 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
Front speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Digital
IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=PCH,DEV=0
HDA Intel PCH, HDMI 0
HDMI Audio Output
dmix:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
Direct sample mixing device
dmix:CARD=PCH,DEV=1
HDA Intel PCH, ALC665 Digital
Direct sample mixing device
dmix:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
Direct sample snooping device
dsnoop:CARD=PCH,DEV=1
HDA Intel PCH, ALC665 Digital
Direct sample snooping device
dsnoop:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Direct sample snooping device
hw:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
Direct hardware device without any conversions
hw:CARD=PCH,DEV=1
HDA Intel PCH, ALC665 Digital
Direct hardware device without any conversions
hw:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
HDA Intel PCH, ALC665 Analog
Hardware device with all software conversions
plughw:CARD=PCH,DEV=1
HDA Intel PCH, ALC665 Digital
Hardware device with all software conversions
plughw:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 0
Hardware device with all software conversions





~$ lspci -v | grep -A7 -i audio
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
Subsystem: Dell Device 04b8
Flags: bus master, fast devsel, latency 0, IRQ 54
Memory at f3c00000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode])





~$ cat /proc/asound/card0/codec* | grep Codec
Codec: Realtek ALC665
Codec: Intel CougarPoint HDMI









I've installed Realtek audio drivers and pretty much tried all tweaks on alsa .conf files a pulse .conf files, to no avail.



As I said, currently the stereo sound is good on both speakers, but how can I get the subwoofer to work?

THanks a million in advance,



Gaucho