audio MBP: status display shows but no volume change

Discussion in 'MacBook Pro' started by bigdeddu, Oct 26, 2011.

  1. bigdeddu macrumors newbie

    bigdeddu

    Joined:
    Oct 26, 2011
    #1
    Hi gentlemens, I've a weird issue on a MBP2010, I've exhausted all forums and google searches and tried almost everyting.

    I've this issue:
    1) fresh boot, audio controls works fine.
    2) plug headset, audio controls works fine.
    3) unplug headset, audio controls change the value displayed (same with the slider) but there's no real volume change.
    3a) if I plug again the headset it works fine, the audio key are ok, but the slider don't or vice versa - so you can change the volume only with one of the two methods.

    in both cases, opt-clicking the volume icon shows the right output device, but the controls are somehow dissociated.
    using the controls in the system-setting/audio panels works always perfectly fine.

    reproducibility: more than 10times out of 10 reboots.

    annoyance: disturbing like a missing teeth in girlfriend.

    what I've tried: reboots, plug/unplug many times, reset various rams, reset the spr, onyx, the old good atari cartridge blow, also with the canned air and N2, various prayers and blasphemies.
    Anyone has a good idea?

    -- please read before answering . nobody here wants to waste time -
    Thanks
     
  2. bigdeddu thread starter macrumors newbie

    bigdeddu

    Joined:
    Oct 26, 2011
    #2
    I cannot believe I'm the only one encountering this issue.. Anyone has any tought?
     
  3. GuitarG20 macrumors 65816

    GuitarG20

    Joined:
    Jun 3, 2011
    #3
    Based on what you've said you've already done, it seems like your only real option is to take it into an Apple store (if possible) and replicate the issue there, and see what they say about it.
     
  4. squeakr macrumors 68000

    squeakr

    Joined:
    Apr 22, 2010
    #4
    When you first unplug the headphones and lose the control, do you see a red light in the headset jack? It may be that the jack thinks it is stuck outputting a digital signal and those can't be volume controlled. The reboot fixes this and then it occurs again after the headset jack is engaged and disengaged. This could mean the headset jack is malfunctioning and would require a repair (as sometimes the pins get stick and think it is outputting a digital signal. Does it output sound through the speakers after the headset jack is unplugged, as this is usually an indication that the jack is stuck in digital output mode?
     
  5. bigdeddu thread starter macrumors newbie

    bigdeddu

    Joined:
    Oct 26, 2011
    #5
    there are no redlights, and the point the microswitch is not stuck. The output source is detected correctly, but the controls don't operate on it.
     
  6. bigdeddu thread starter macrumors newbie

    bigdeddu

    Joined:
    Oct 26, 2011
    #6
    I've migrated all my configuration on a perfectly working imac, and is reproducing the issue. It must be software, then. Do someone have any idea of which it can be the responsible? I've too many softwares for a list... so I unleash the power of "ls"!;)

    Address Book.app
    Adobe
    Adobe After Effects CS5
    Adobe Bridge CS5
    Adobe Device Central CS5
    Adobe Encore CS5
    Adobe Extension Manager CS5
    Adobe Flash CS5
    Adobe Illustrator CS5
    Adobe InDesign CS5
    Adobe Media Encoder CS5
    Adobe Media Player.app
    Adobe OnLocation CS5
    Adobe Photoshop CS5
    Adobe Premiere Pro CS5
    Adobe Soundbooth CS5
    Alfred.app
    App Store.app
    Automator.app
    Bamboo Dock
    BetterTouchTool 2.app
    Billings.app
    Bricksmith
    CS ChemOffice 2010
    Calculator.app
    CandyBar.app
    Chess.app
    CrystalMaker Demo.app
    DVD Player.app
    Dashboard.app
    Daylite 3
    Dictionary.app
    DjView.app
    Dropbox.app
    EndNote X4
    FileZilla.app
    Firefox.app
    Flip4Mac
    Font Book.app
    Front Row.app
    GPG Keychain Access.app
    GarageBand.app
    Gimp.app
    GoodSync.app
    Grooveshark.app
    Image Capture.app
    Inkscape.app
    KaleidaGraph 4.1 Demo
    Keka.app
    Live 7.0.14 OS X
    MATLAB_R2009b.app
    MPlayer OSX Extended.app
    MacPilot.app
    MacPorts
    Mail.app
    ManyCam
    Microsoft Office 2011
    Microsoft Silverlight
    MiddleClick 2.app
    Mindjet MindManager.app
    Neverwinter Nights
    OnyX.app
    Path Finder.app
    Pen Tablet.localized
    Photo Booth.app
    Preview.app
    QuickTime Player.app
    Quicksilver.app
    R.app
    R64.app
    Rainlendar2-Lite.app
    Rainlendar2-Pro.app
    Remote Desktop Connection.app
    Safari.app
    SilverKeeper.app
    Simple Comic.app
    SingleCrystal.app
    Skype.app
    Soulver.app
    Steam.app
    Stickies.app
    System Preferences.app
    TeX
    TextEdit.app
    ThemePark.app
    Thunderbird.app
    Time Machine.app
    Utilities
    VLC.app
    Veoh Web Player.app
    VirtualBox.app
    Winamp.app
    Xee.app
    gedit.app
    graphics
    iCal.app
    iChat.app
    iDVD.app
    iMovie.app
    iPhoto.app
    iSync.app
    iTunes.app
    iWeb.app
    iWork '09
    office
    uTorrent.app
     

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