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Thread: No input from any mic

  1. #1
    Join Date
    Feb 2014
    Beans
    3

    No input from any mic

    My system no longer records any audio from the laptop's internal microphone. I can't even record static!
    External microphones also do not work. I've tried all the suggestions that I could find in other threads.

    Running lubuntu 12.04.04 on a Thinkpad X200.

    # uname -a
    Linux name-Thinkpad 3.2.0-59-generic-pae #90-Ubuntu SMP Tue Jan 7 23:07:06 UTC 2014 i686 i686 i386 GNU/Linux

    # aplay -l
    **** List of PLAYBACK Hardware Devices ****
    card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

    # cat /proc/asound/version
    Advanced Linux Sound Architecture Driver Version 1.0.24.

    # head -n 1 /proc/asound/card*/codec#*
    Codec: Conexant CX20561 (Hermosa)

    this is the content of my alsa-base.conf
    Code:
    # autoloader aliases
    install sound-slot-0 /sbin/modprobe snd-card-0
    install sound-slot-1 /sbin/modprobe snd-card-1
    install sound-slot-2 /sbin/modprobe snd-card-2
    install sound-slot-3 /sbin/modprobe snd-card-3
    install sound-slot-4 /sbin/modprobe snd-card-4
    install sound-slot-5 /sbin/modprobe snd-card-5
    install sound-slot-6 /sbin/modprobe snd-card-6
    install sound-slot-7 /sbin/modprobe snd-card-7
    
    # Cause optional modules to be loaded above generic modules
    install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-ioctl32 ; /sbin/modprobe --quiet --use-blacklist snd-seq ; }
    #
    # Workaround at bug #499695 (reverted in Ubuntu see LP #319505)
    install snd-pcm /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; }
    install snd-mixer /sbin/modprobe --ignore-install snd-mixer $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-mixer-oss ; : ; }
    install snd-seq /sbin/modprobe --ignore-install snd-seq $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; /sbin/modprobe --quiet --use-blacklist snd-seq-oss ; : ; }
    #
    install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }
    # Cause optional modules to be loaded above sound card driver modules
    install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-emu10k1-synth ; }
    install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq ; }
    
    # Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)
    install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist saa7134-alsa ; : ; }
    # Prevent abnormal drivers from grabbing index 0
    options bt87x index=-2
    options cx88_alsa index=-2
    options saa7134-alsa index=-2
    options snd-atiixp-modem index=-2
    options snd-intel8x0m index=-2
    options snd-via82xx-modem index=-2
    options snd-usb-audio index=-2
    options snd-usb-caiaq index=-2
    options snd-usb-ua101 index=-2
    options snd-usb-us122l index=-2
    options snd-usb-usx2y index=-2
    # Ubuntu #62691, enable MPU for snd-cmipci
    options snd-cmipci mpu_port=0x330 fm_port=0x388
    # Keep snd-pcsp from being loaded as first soundcard
    options snd-pcsp index=-2
    # Keep snd-usb-audio from beeing loaded as first soundcard
    options snd-usb-audio index=-2
    
    options snd-hda-intel position_fix=1
    options snd-hda-intel model=thinkpad


    These are my alsamixer settings.


    Any help would be greatly appreciated!

  2. #2
    Join Date
    Jun 2007
    Beans
    11,501

    Re: No input from any mic

    Have you tried "model=lenovo-x200" intead of "model=thinkpad" (Note: in newer kernels, no model override should be necessary)
    model=thinkpad is for a different Conexant codec

  3. #3
    Join Date
    Feb 2014
    Beans
    3

    Re: No input from any mic

    No luck with "model=lenovo-x200"
    Oddly, I've gotten Audacity to record some static-ey noise, but only for a fraction of a second, and only immediately after I adjust certain settings or force reload alsa.

  4. #4
    Join Date
    Feb 2014
    Beans
    3

    Re: No input from any mic

    Oh actually, that did help my external mic work!
    The internal one still does not work, though. Do you have any suggestions about how I might determine whether this is a hardware or a software issue?

    Thank you!

  5. #5
    Join Date
    Oct 2009
    Location
    Reykjavík, Ísland
    Beans
    10,422
    Distro
    Lubuntu 14.10 Utopic Unicorn

    Re: No input from any mic

    A live boot of Lubuntu 13.10 might give an indication.
    About problems due to upgrading
    Bringing old hardware back to life.
    Please visit Quick Links -> Unanswered Posts

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