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Thread: Problems with ALC272

  1. #1
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    Angry Problems with ALC272

    I have been biting my nails on this problem since more than 8 hours now. I rebuild ALSA twice, got the latest stable version, installed the one from ubuntu-audio-dev, but nothing.

    The output from alsa-info.sh can be found here: http://www.alsa-project.org/db/?f=96...2f4402acb8c043

    I have this Toshiba and the sound device is just completely messed up and partly depends on if I have headphones plugged into the machine when booting it up:
    Then sometimes everything (Microphone, Headphone, Speakers) works fine. But other times the speakers do not work at all then only the headphones. If I have the headphone not plugged in than in 75% of cases (roughly) the speakers won't go mute when I plug the headphones in.

    The microphone(s) is the biggest concern as I need the computer to use Skype. Obviously I would want the jack to work... They sometimes respond when booted, but other times not. They more often work when the microphone jack is plugged in, but fail after a little while, then sometimes they don't work at all.

    It frustrating, I have tried various models of the ALC272 driver, but none works for this machine.

    Any help with this would be much appreciated...

    Chris

  2. #2
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    Re: Problems with ALC272

    Just want to bump this thread. I have no idea how to fix it and I can't see any instructions on how to submit issues to ALSA... but I'll check again.

  3. #3
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    Re: Problems with ALC272

    This one can be difficult because both the analog and hdmi use the same module, so i think sometimes they get crossed up and I'm not sure how to load the correct one as default.
    You can try reloading alsa when this happens:
    Code:
    sudo alsa force-reload
    You should probably specify a model switch for alsa as well.
    Using a Terminal="Applications->Accessories->Terminal"
    Open this file for editing:
    Code:
     gksudo gedit /etc/modprobe.d/alsa-base.conf
    Insert this line at the bottom:
    Code:
     options snd-hda-intel model=auto
    Save. Close. Reboot.
    Check your levels in alsamixer.
    Code:
     alsamixer
    Press <F6> to select the correct soundcard.
    Press <F3> to show playback levels. <F4> selects capture levels [or use <Tab>]
    Use the left/right arrow keys to select and up/down arrow keys to change levels. <M> to mute/unmute.
    Go to "System ->Preferences ->Sound" and make sure the correct soundcard is default and adjust your profile on the hardware tab.
    On the output tab choose the correct device.

  4. #4
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    Re: Problems with ALC272

    Thanks for the info lidex!

    Forcing alsa to reload doesn't really do the trick unfortunately, it just keeps the status quo.

    Adding
    options snd-hda-intel model=auto
    to the alsa-base.conf doesn't solve the problem either. It makes it worse, as alsa seems to restart constantly (I see the speaker going mute and unmute all the time).

    What do you mean by '...specify a model switch...'?

    I have read in the ubuntu sound troubleshooting guide that you can stop soundcards from switching. You should see what's available in
    /proc/asound/modules
    and then somehow add them to
    /etc/modprobe.d/alsa-base.conf
    .

    Unfortunately the sound cards carry the same name in the modules file... any idea what I could do with that?

    Thanks, Chris

  5. #5
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    Re: Problems with ALC272

    Can you post these outputs please:
    Code:
    sudo dmidecode -t bios
    sudo dmidecode -t baseboard
    I think it would be helpful to install and test a mainline kernel following the directions here:
    https://wiki.ubuntu.com/Kernel/MainlineBuilds
    The issue may be fixed upstream.

  6. #6
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    Re: Problems with ALC272

    Sure will and thanks for your help!

    Here is dmidecode -t bios:

    # dmidecode 2.9
    SMBIOS 2.4 present.

    Handle 0x0000, DMI type 0, 24 bytes
    BIOS Information
    Vendor: TOSHIBA
    Version: V1.20
    Release Date: 11/17/2009
    Address: 0xE48D0
    Runtime Size: 112432 bytes
    ROM Size: 1024 kB
    Characteristics:
    PCI is supported
    PNP is supported
    BIOS is upgradeable
    BIOS shadowing is allowed
    ESCD support is available
    Boot from CD is supported
    Selectable boot is supported
    Print screen service is supported (int 5h)
    8042 keyboard services are supported (int 9h)
    Serial services are supported (int 14h)
    Printer services are supported (int 17h)
    CGA/mono video services are supported (int 10h)
    ACPI is supported
    USB legacy is supported
    IEEE 1394 boot is supported
    Smart battery is supported
    BIOS boot specification is supported
    Targeted content distribution is supported
    BIOS Revision: 1.32
    Firmware Revision: 1.32
    and here's dmidecode -t baseboard:

    # dmidecode 2.9
    SMBIOS 2.4 present.

    Handle 0x0002, DMI type 2, 8 bytes
    Base Board Information
    Manufacturer: TOSHIBA
    Product Name: NBWAE
    Version: 1.00
    Serial Number: 0123456789AB

    Handle 0x000A, DMI type 10, 6 bytes
    On Board Device Information
    Type: Sound
    Status: Disabled
    Description: Realtek HDA-01
    Unfortunately the laptop is no longer with me, so I only have access via SSH. Therefore I wouldn't be too keen to play around with the kernel remotely. If something fails I lose access altogether ...

  7. #7
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    Re: Problems with ALC272

    Three things: bios update, upstream kernel, blacklisting hdmi if you're not using it. The module for that is:
    Code:
    snd_hda_codec_hdmi
    You would just add it to /etc/modprobe.d/blacklist.conf in superuser mode and reboot.

  8. #8
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    Re: Problems with ALC272

    Quote Originally Posted by lidex View Post
    This one can be difficult because both the analog and hdmi use the same module, so i think sometimes they get crossed up and I'm not sure how to load the correct one as default.
    You can try reloading alsa when this happens:
    Code:
    sudo alsa force-reload
    You should probably specify a model switch for alsa as well.
    Using a Terminal="Applications->Accessories->Terminal"
    Open this file for editing:
    Code:
     gksudo gedit /etc/modprobe.d/alsa-base.conf
    Insert this line at the bottom:
    Code:
     options snd-hda-intel model=auto
    Save. Close. Reboot.
    This worked for me. Thank you so much! (Toshiba NB205 with Ubuntu 10.04, RealTek ALC272)

  9. #9
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    Re: Problems with ALC272

    Hi, this is an old thread so it has been closed, please do not post in threads that are a year or more old, and thanks for sharing.

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