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Thread: HP dv7t-4100 Subwoofer not working

  1. #1
    Join Date
    Dec 2006
    Beans
    Hidden!
    Distro
    Ubuntu

    HP dv7t-4100 Subwoofer not working

    The Subwoofer in my HP dv7t-4100 notebook doesn't work, I get very weak sound from the other small speakers and it sucks listening to music on the laptop without the headphones.

    I'm running ubuntu 11.10 and I believe it's not related to the BETA, this problem exist in ubuntu 11.04 on the same laptop.

    lspci output:
    Code:
    00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
    00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02)
    00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
    00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
    00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
    00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
    00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
    00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
    00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
    00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
    00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
    00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
    00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
    01:00.0 VGA compatible controller: ATI Technologies Inc Manhattan [Mobility Radeon HD 5400 Series]
    01:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series]
    02:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
    03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
    7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
    7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
    7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
    7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
    7f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
    7f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
    n3rve@n3rve:~$
    aplay -L
    Code:
    default
        Playback/recording through the PulseAudio sound server
    pulse
        Playback/recording through the PulseAudio sound server
    front:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        Front speakers
    surround40:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        4.0 Surround output to Front and Rear speakers
    surround41:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        4.1 Surround output to Front, Rear and Subwoofer speakers
    surround50:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        5.0 Surround output to Front, Center and Rear speakers
    surround51:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        5.1 Surround output to Front, Center, Rear and Subwoofer speakers
    surround71:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
    dmix:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        Direct sample mixing device
    dsnoop:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        Direct sample snooping device
    hw:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        Direct hardware device without any conversions
    plughw:CARD=Intel,DEV=0
        HDA Intel, STAC92xx Analog
        Hardware device with all software conversions
    hdmi:CARD=Generic,DEV=0
        HD-Audio Generic, HDMI 0
        HDMI Audio Output
    dmix:CARD=Generic,DEV=3
        HD-Audio Generic, HDMI 0
        Direct sample mixing device
    dsnoop:CARD=Generic,DEV=3
        HD-Audio Generic, HDMI 0
        Direct sample snooping device
    hw:CARD=Generic,DEV=3
        HD-Audio Generic, HDMI 0
        Direct hardware device without any conversions
    plughw:CARD=Generic,DEV=3
        HD-Audio Generic, HDMI 0
        Hardware device with all software conversions
    n3rve@n3rve:~$
    I ran alsamixer and nothing is muted. Any help is appreciated.
    HP Pavilion dv7-6005tx
    Ubuntu 13.10 / Unity

  2. #2
    Join Date
    May 2008
    Location
    Ohio, USA
    Beans
    6,905
    Distro
    Ubuntu Gnome 15.04 Vivid Vervet

    Re: HP dv7t-4100 Subwoofer not working

    Use the alsa-info-script to provide detailed information.
    Run this command in a terminal:
    Code:
    wget http://www.alsa-project.org/alsa-info.sh -O alsa-info.sh && bash alsa-info.sh
    Choose the upload option and provide a link for the output.

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