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    2.1 audio not working in Kubuntu 13.10

    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
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