Has anybody got audio working with EFI Windows? MBP 13" E2011

Discussion in 'Windows, Linux & Others on the Mac' started by yangm, May 10, 2014.

  1. yangm macrumors newbie

    yangm

    Joined:
    Apr 16, 2014
    #1
    So... I tried every possible combination of drivers/windows install w/o success.
    Tried Windows 8/8.1 with bootcamp drivers, intel drivers, moded cirrus logic drivers, even tried some driver programs. This is the only thing keeping me from using EFI windows. BTW you can get amazing battery time when using EFI windows.

    Guess I don't need to discuss why BIOS mode is awful.
     
  2. Henk Poley macrumors regular

    Joined:
    Sep 22, 2008
    #2
    Since on MacBook1,1 the audio drivers installs a monitoring service that continuously asks the audio port if a S/PDIF cable has been inserted (taking ~1% cpu). Might it be that just installing windows the regular way, and then disabling that service & taskbar program would improve the battery life?
     
  3. yangm thread starter macrumors newbie

    yangm

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    Apr 16, 2014
  4. Quackers macrumors 6502a

    Joined:
    Sep 18, 2013
    Location:
    Manchester, UK
    #4
    Some Macs have working sound (Cirrus) in EFI and some don't.
    Mine is the latter and I've seen no method of getting sound to work. I'm not even sure that it's a driver issue, though some people have tried and found that though it's a Cirrus audio system the driver could be from Intel :confused:
    It's possible that the problem is an EFI problem in that the card is not allowed to start on boot (maybe no resources allocated to it).

    I believe some people have an external sound card attached to get around the problem.
     
  5. yangm thread starter macrumors newbie

    yangm

    Joined:
    Apr 16, 2014
    #5
    Looks like refind supports efi drivers, that may help.
    Also, I remember seeing someone moding a cirrus logic driver to work with xp (long time ago) so I think that we may have better lucky moding drivers, since the device still the same, only with a different ID.
     
  6. Quackers macrumors 6502a

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    Sep 18, 2013
    Location:
    Manchester, UK
    #6
    Refind won't help, I tried. On mine the Cirrus card is not being allocated any resources (ram etc) so cannot start.
     
  7. yangm thread starter macrumors newbie

    yangm

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    Apr 16, 2014
  8. Quackers macrumors 6502a

    Joined:
    Sep 18, 2013
    Location:
    Manchester, UK
    #8
    Apple does it by CSM. Linux does it differently.
    This is only my best guess but I suspect it would take a firmware update for models that don't currently work.
     
  9. nfl46 macrumors 603

    Joined:
    Oct 5, 2008
    #9
    Has anybody got audio working with EFI Windows? MBP 13" E2011

    I tried everything yesterday to get audio working on EFI windows and still didn't get it to work. I have an E2011 as well. What I had to do was burn the .iso to a disk and run bootcamp and allow it to partition the drive. I ran everything through it and sound now works.


    Bootcamp = sound works
    EFI = sounds doesn't work

    I was trying this with Windows 8.1, by the way.
     
  10. cammykool macrumors regular

    Joined:
    Sep 24, 2011
    Location:
    Anaheim, California
    #10
    i had W8 on the same bmp and it worked fine (though i updated from 7)
     
  11. thomaskc macrumors 6502

    Joined:
    Aug 19, 2010
    #11
    Does the intel driver and gpu switch work when you install windows 8.1 through EFI ? Unlike bootcamp?
     
  12. yangm thread starter macrumors newbie

    yangm

    Joined:
    Apr 16, 2014
    #12
    IDK, I have the 13" model, so no dedicated graphics for me. But everything else seems to run more smoothly.
     

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