Audio not working, Windows 10

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Level 1

5 points

Audio not working, Windows 10

Good day,

I did a clean install (nothing at all on the computer for Windows previously) with a Windows 10 ISO. I have everything working great, but cannot get the Audio to work. It shows a Red X on the speaker icon in the bottom right and I have tried to update/install the RealTek drivers off of the Boot Camp I had and 5.1. Has anyone been able to fix that Red X issue and have audio working? In Device Manager it also has an exclamation on the Audio Controller.

Mid-2011 iMac, using Bootcamp 5.1 drivers.

Posted on Feb 6, 2016 6:37 AM

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Answer 1

Loner T

Level 9

59,471 points

Feb 6, 2016 6:52 AM in response to eriddler

Was W10 installed using EFI Boot? You can check by running msinfo32 and looking at BIOS mode.

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Answer 2

eriddler Author

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Feb 6, 2016 12:46 PM in response to Loner T

Yes, it is EFI. I saw other posts that mention EFI doesn't work, so my question would be: how do I change to another way of booting? It was already a pain to get W10 to install in the first place, and not sure what I would do different.

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Answer 3

Loner T

Level 9

59,471 points

Feb 6, 2016 2:31 PM in response to eriddler

Instead of EFI boot, do you get an error when you choose the legacy Windows icon?

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Answer 4

eriddler Author

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Feb 6, 2016 10:07 PM in response to Loner T

I don't have a legacy option. When I hold down the option key, I have OS X, Recovery, and Windows 10.

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Answer 5

Loner T

Level 9

59,471 points

Feb 7, 2016 6:42 AM in response to eriddler

Was BC Assistant used to install W10? BCA on your specific model will create a Hybrid MBR which then results in a BIOS/MBR installation. If W10 is installed using a previous W7/W8+ installation, it should also result in a legacy installation.

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Answer 6

eriddler Author

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Feb 7, 2016 8:58 AM in response to Loner T

It was a clean install, no prior Win7/8+ installation. I did use BCA to install W10. When I looked at the System Information in W10, it showed EFI.

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Answer 7

Loner T

Level 9

59,471 points

Feb 7, 2016 9:29 AM in response to eriddler

Can you post the output of following OS X Terminal command?

sudo fdisk /dev/disk0

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Answer 8

eriddler Author

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Feb 7, 2016 10:28 AM in response to Loner T

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 0 0 2 - 1023 255 63 [ 1 - 976773167] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

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Answer 9

Loner T

Level 9

59,471 points

Feb 7, 2016 3:50 PM in response to eriddler

How much work is it to remove this installation, create a new partition, check the MBR and use a physical DVD to install W10?

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Answer 10

eriddler Author

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5 points

Feb 7, 2016 10:41 PM in response to Loner T

This is just a side project, to see if I can make it happen. So I can do that, though I don't have a physical DVD. Used an ISO on a USB to install (modified plist to make the computer able to use USB)...

Do I just delete the partition and then create another one? What type of partition? I have not 'checked' an MBR before, but I can find out how online. Finally, can I put the ISO on a DVD and use it to install?

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Answer 11

Loner T

Level 9

59,471 points

Feb 8, 2016 6:35 AM in response to eriddler

Use BCA to remove Windows (do not use Disk Utility). Burn the ISO to a physical DVD. You can leave the current USB installer as is. Use BCA's last option Install (or Remove) as necessary and test.

Please also see Disk Utility 12.x: Duplicate a disk, CD, or DVD .

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Answer 12

eriddler Author

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Feb 10, 2016 9:03 AM in response to Loner T

Just got some DVD-Rs (live in Greece right now, not as quick to get things here) so I'll work on it soon. I saw an answer concerning audio card Driver...could it be something simple like that ?

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Answer 13

Loner T

Level 9

59,471 points

Feb 10, 2016 12:44 PM in response to eriddler

If it was a driver issue, BC driver installation should have installed. The issue is that the BC drivers do not see the audio devices when installing with EFI boot.

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Answer 14

eriddler Author

Level 1

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Feb 12, 2016 5:47 AM in response to Loner T

So tried to use BCA to remove Windows 10, and got this error: Your disk could not be restored to a single partition.

Any advice for proceeding?

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Answer 15

Feb 12, 2016 7:35 AM in response to eriddler

Hi people:

I received a MBP 13" late 2K11, and have to deal a lot to install Win10. What work me fine was; download the win10 Pro 64bits iso; using "El Capitan" BCA make an usb driver drive and install from DVD the windows10 with the USB drive pluged in.

As many folks says my windows msinfo32 says BIOS Mode --> Legacy.

After the windows 10 install; all audio : speakers and mic worked fine.

Rigth now I'm dealing with no mic after windows update but that's other issue.

Hope this works for you!

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