No sound in Bootcamp Windows 8.1

Hi.
I recently installed Windows 8.1 on my Macbook Pro, late 2011 model and ran the Bootcamp software. Everything works great except there is no audio playing at all, I have an X mark on the volume control, troubleshooting results in a 'A recent hardware might have not been detected' I have no Sound, video and gaming controllers' in the Device Manager, there is 'High Definition Audio Controller' in the Device Settings, though has a warning sign on it, I checked it and tried to update the driver but it says that it's the latest one installed. I had tried to re-run the Bootcamp drivers software and downloaded the Realtek audio drivers from the internet, but it still not working, though a Realtek High Definition Audio driver is now detected in the Device Manager, but not working, it has an warning sign too, When I try to run the troubleshooter it says that Realtek High Definition Audio has a driver problem.
Please help me, this is so frustrating.

I was thinking about upgrading my entry level MBP 13" late 2011 to the top of the line rMBP 15 late 2013 for gaming, I thought I could install Windows and run any game just fine without losing the OS X experience. I had no issues before with Bootcamp with Windows 8 x64 back when I had Lion. Now I'll just buy a Razer Blade and ditch Apple.
Sadly, once I installed 8.1 x64 on my current MBP with Mavericks, I've had every single possible issue with a laptop that according to Apple supports Windows 8.1, first I couldn't create an install usb drive without first burning the .iso file to a DVD, which was possible before Mavericks. I don't have a DVD with Windows 8.1, since I received the OS through dreamspark, so I come to think, what if I buy the rMBP that lacks a DVD drive? I found a way to get the option to create the install drive from a .iso file, attempted to install, then had an issue with the partition created by Bootcamp, Windows wouldn't let me install in that partition, nor I could erease it then use it with the tools of the install setup. So I went to disk utility, deleted the partition, and left that as free space, booted back to the setup, and finally installed Windows by creating an NTFS partition at the free space. After I installed Windows, and installed the drivers provided by Apple, I had no sound, the driver was not working, and spent 3 days actively looking for a solution online, tried a lot, none work. Finally uninstalled Windows 8.1, I'm using VM Ware now, but gaming is not the same on a virtual machine.
I thought Bootcamp had real support, this is not the case. Razer Blade, here I come!

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My Macbook Pro has a black screen when running in Bootcamp Windows 7. Since I updated the mac side my windows side now starts up with completely black screen - no prompt, nothing, Cap keys still light up as does mouse and DVD drive seems to run.
Will not show up in safe mode, will not show when started from Windows 7 DVD.
I suspect the Mac update wiped out my PC video drivers but can not think of a way to re-install?
Can see the PC volume from Mac side with files.
I've looked at all the online solutions so far and have tried most of them without success. Please help!
Specs:
2009 Macbook Pro, 3.06 GHz Intel 2 core, Max 10.6.8.
Model Name:          MacBook Pro
Model Identifier:          MacBookPro5,2
Processor Name:          Intel Core 2 Duo
Processor Speed:          3.06 GHz
Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          6 MB
Memory:          4 GB
Bus Speed:          1.07 GHz
Boot ROM Version:          MBP52.008E.B05
SMC Version (system):          1.42f4
Serial Number (system):          7302300GANE
Hardware UUID:          B2D4B4B4-CD92-5C7A-BDC2-527D30DD8DF3
Sudden Motion Sensor:
State:          Enabled

EDIT: RESOLVED
For anyone else who finds their way here like I did, this link did it for me: https://forums.geforce.com/default/topic/527599/windows-8-issues-solved-please-r ead-if-you-39-re-having-black-screen-and-or-flickering-/
Specifically, the posts by Dunsany and valkyr did the trick. I booted in safe mode, uninstalled and deleted the Nvidia driver, disabled automatic driver installation, and restarted normally. I then manually downloaded and installed the previous Nvidia driver for my graphics card (which at the time of this writing was 335.23, rather than the latest which was 337.88), and everything is now bueno!
Two hiccoughs along the way: First, when I tried to uninstall the Nvidia driver the first time, when I restarted I got the login screen (which was a good sign), but it quickly went black again. I powered down, restarted in safe mode again, and repeated the uninstallation process, and it worked the second time. Second, when I started the manual install of the 335.23 driver, the computer played a sound similar to the one for disconnecting a USB device, and the screen went black. I'd seen a lot about trying to increase the brightness (though it hadn't worked up to this point; but if you haven't tried it yet, might as well); I tried it, and it worked! So far I'm back up and running. [/fingers crossed]
Hope this helps someone else!

No sound in bootcamp

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Hi
It sounds like you've eliminated hardware problems, so I think you need to play with the Microsoft Windows audio settings. A faulty "Balance" setting could cause sound to come from just one speaker.
On Windows XP, the place to start is Control Panel > Sounds and Audio Devices
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1. I have tried copying the Keyboard/Trackpad/Mouse drivers to the $WinPEDriver$ directory with mixed success on a 2012 MBP.
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I'm very confused.
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Do you have FileVault enabled or a Mac with a "Fusion" drive?
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Hi there and thanks for reading.
Bottom line Bootcamped Windows 7
I just want to be able to HEAR my line in input in REALTIME not a 1-2sec delay like the "listen to device" thing in windows has by default.
I've tried to install realtek drivers however I get an error message.
I've attempted to install other drivers and those fail as well.
It's upsetting because litereally everything else works (minus the aircard for some reason but I dont mind using a cable) and the internal speakers.
If anyone has had the same problem and found a fix. please please do share.

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1) create a windows system repair disk. you can do this in your virtual machine. since you cannot boot from cd. you need to create the repair disk directly into an iso file. windows only lets you choose an existing cdrw drives, so you need to simulate a cd burner. use TotalMounter for this. its free and does exactly what you need.
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WW Social Media
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ExpressCard/34 not working in BootCamp Windows 7 64-bit. Apple's BIOS emulation does not give enough resources.

MacBook Pro unibody, 15" 2009
ExpressCard/34 (Card is by Transcend TS-RDF1, JMicron chip for SD card) is not working in BootCamp Windows 7 64-bit. Windows reports:
"This device cannot find enough free resources that it can use. (Code 12)
If you want to use this device, you will need to disable one of the other devices on this system."
Other data points: Card works fine in Mac OSX, worked under Windows XP 32-bit (initially reported same problem, but works after reboot).
Checking the forums there seems to be no actual device suggested to actually remove that would help the problem. And even if it was, the concept is ridiculous. What other device would you like to remove? Display adapter? Network adapter? No way. I use all available devices and don't want to compromise.
It seems like BIOS emulation does not allocate enough resources to ExpressCard.
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Is there anyone at Apple who cares to provide a solution?

It is not a driver problem, but a problem in the BIOS emulated by bootcamp on some (not all) MBP models. So unless Apple fixes it in bootcamp, there is no real solution. And obviously, Apple doesn't care. They are dropping the Expresscard slot anyway.
Unfortunately, this poster seems right: http://forums.macrumors.com/showthread.php?t=912259 :
The 2008/2009 Macbook Pros don't allow to use the ExpressCard slot because of EFI/Bootcamp errors (Windows Vista/7 cannot allocate an IRQ to the slot). You don't need any drivers for using an ExpressCard slot on Windows, you only need the drivers for the corresponding card you are using.
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And from the Sonnet site ( http://www.sonnettech.com/product/tempo_sata_express34.html ) :
Tempo SATA ExpressCard/34 not supported under Windows 7 or Windows Vista when running on unibody MacBook Pro computers. The problem is caused by the MacBook Pro's BIOS emulation, which doesn't allocate enough resources to support certain kinds of Expresscard/34 devices, such as a SATA controller, in these operating systems.
(added link to Sonnet's explanation)

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See iMac (27-inch, Late 2012): Boot Camp alert with 3TB hard drive

I have Windows XP Pro as my Bootcamp option under Snow Leopard. If I upgrade to Lion will I still be able to use this Bootcamp Windows XP operating system as I dont have Windows 7 yet

I have Windows XP Pro as my Bootcamp option under Snow Leopard which works very well indeed.
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Boot Camp- Some computers require Microsoft Windows 7

Bootcamp WIndows 7 x64 and Syncmaster 204b external monitor

Hi,
I didn't see a sub-forum for external monitors so I hope the Firmware forum is ok since this seems like a drivers/graphics card issue issue.
The issue I'm having is that Mac OS crashes randomly when I connect my external Samsung Syncmaster 204b monitor to my Macbook Pro when running Windows 7 x64 under Bootcamp. The external monitor turns yellow and the Macbook LCD turns gray and I'm forced to do a hard-reboot. Windows does detect the monitor and I can see it with it's correct name under Windows Display Properties.
Everything works fine when I run the monitor under Mac OS 10.6.4.
I'm running Windows 7 x64 on a mid-2010 Macbook Pro 13". I have all of the latest updates installed for Windows and am using Bootcamp 3.1.
Has anyone encountered a similar issue or have any ideas how this may be resolved?
Thanks, -Scott
Message was edited by: Scott Cullen

Ok, I think this problem has been resolved, so I'll post the solution in case others with the Samsung Syncmaster 204B have the same problem. The answer was erasing the PRAM by holding Option-Command-P-R at boot up (http://support.apple.com/kb/ht1379).
This is what I think happened:
An update in Windows Update is available for the Syncmaster 204B, but wasn't visible when I first connected the Syncmaster. I wasn't able to see the update until I rebooted with the Syncmaster connected (after several crashes). After seeing the update in Windows Update under 'Optional Updates", called "Samsung - Display- 204T/204Ts/204B, Syncmaster Magic CX20Ts(digital)", I installed it, but bootcamp Windows continued to crash randomly after attaching the Syncmaster via both Mini Display Port-to-DVI and Mini Display Port-to-VGA. Sometimes it crashed after a few minutes, sometimes an hour, the same as before I installed the update.
I was convinced that it was a compatibility problem between Windows 7 x64, the Syncmaster 204B and the MacBook Pro 13" Mid-2010 hardware since this problem only happened when booting into bootcamp Windows 7 x64 (everything worked fine in Mac OS), but now that doesn't seem to be the case. I think the update fixed the problem, but after installing the update some of the of the original incompatible display settings remained resident in the Mac's PRAM. Erasing the PRAM cleared these settings and allowed the new updated settings to be loaded instead, fixing the crash issue.
-Scott

If I partitioned my drive from within a bootcamped windows volume will it destroy my GPT scheme and disable my booting ability into Mac OSx?

Alright I consider myself a fairly computer literate person but do excuse me if this issue is not actually all that interesting. Know that I would call apple care but what I am trying to do isn't exactly supported by them so they wouldn't help me. I am setting up my system to triple boot. I did the normal method as far as I can tell. I used bootcamp assistant to shrink my drive and installed windows through that. All went well. So then I had a apprx 400gb mac os volume and a 100gb windows volume. Following the advice from the mactel team over at the ubuntu help site I logged into windows via startup+option. When I did this all volumes popped up. recovery mac and windows. selected windows and then used the windows disk utility equivalent to shrink that partition in half. When I did this I check the disk manager and all was well. all volumes were there and healthy. When I restarted my computer in the boot manager window though only the recovery boot and the windows boot showed up. After doing a little research I figured that the error was negligible and that I could fix it easily enough later so I proceeded to then format the free space volume into an ntfs for the ubuntu setup. When I did that and restarted only the windows boot shows up in the boot menu. When I look through disk manager all of the partitions are where they should be and healthy. The only real clue I've found is that when inside of bootcamp control panel instead of the different volumes showing up as they are normally supposed to it gives me the option of startup from the windows volume the ntfs volume and a pseudo volume that doesnt physically exist that serves the purpose of windows recovery. This makes me think something went wrong with bootcamp. I would rEFIt it and try to see if theres some magic I could work in there but I can't install that program on windows. Additionally I found out that theres some talk that ssd can only handle two bootable partitions and that perhaps when I added a partition it shifted priority to volumes 2 and 3 instead of 1 and 2. I've tried all of the bootup tricks i know and some I looked up. the only one that still works is the boot manager window. The rest just do nothing and then go straight to windows which makes me thing if something happened with bootcamp that all the very low level osx to setup and then run windows on top of that- that now the operation isn't running as planned and windows is actually touching the hardware thus subverting any attempts to use low level osx tricks to get around it. Anyway those are the facts and my thoughts.
Having done more research than when I originally wrote ^^ I now realize that the entire reason for bootcamp (sans driver issues) is to deal with the difference between the use of GPT and MBR. I am now pretty sure that rewriting any part of the drive from software that uses MBR will mess up the partition scheme of the entire drive. Additionally I've seen a few things about ssd's being weird when they have too many partitions on them. And lastly I have an iso image of my computer right before I started tinkering so if anything I can factory reset and voila(I don't feel like pulling up a french keyboard).
picture from disk manager in windows

I actually managed to get the setup running and relatively stable. There were alot of random issues and quite honestly I was fixing my computer more often that I was using it so I backed out. If anyone wants to do this like I did I would say: It's not easy and definitely not for someone who doesn't know anything about the differences between operating systems and partitioning schemes. That being said I didn't know nearly enough and if you're careful its possible. The steps however aer pretty simple.
Before doing anything get a third party boot handle up and stable on your machine.
1. Create a partition for Windows
2. Create a partition for Linux
3. Bootcamp Windows. This step can be tricky with the extra partition because bootcamp tries to handle all of it for you so it may benefit some people to bootcamp first and then create a linux partition. But that comes with its own set of issues.
4. Run Linux setup from inside of osX NOT windows.
There are a hundred steps that could come between each of those and I neither have the expertise nor the balls to empower someone who needs to read a forum post how to do it. But it really wasn't more conceptually complicated than that.
Now on to the new issue. I was getting .NET framework incompatibilities and the whole reason I wanted the windows setup was to game so I deleted that partition. When I did that everything went back to normal EXCEPT somewhere somehow the windows boot manager is still buried and when I boot up it tries to boot into windows which obviously doesnt exist anymore. Any advise on how to get rid of this?
to make things clear I'm now running "single" partition.
@Allen Eckert

Bootcamp Windows 7 Install Problem

Hi,
I am having problems Installing Windows 7 via Bootcamp on My Macbook Pro 13" Early 2011 (running Mavericks) and was wondering if anyone could help/offer advice.
I took out the optical drive and put in an SSD a while ago, and now I want to install Windows 7 on the SSD. So firstly I tried installing it using a Windows 7 disc and an external optical drive but apparently you can't install it using that method (when you try to install it comes up with a blank screen and blinking cursor). Next I made a bootable USB using an ISO image, and tried to install via the BCA. But when I restart and try to install, it comes up with a black screen saying there is no bootable drive present; I have even tried holding down alt on start up to see what options I have for booting but all I have is the recovery drive and my SSD.
One thing I have read is that I can buy an external SuperDrive, amend the coding in the terminal (or somewhere) which will make the drive compatible with my mac, and then install Windows 7 via Disc through BCA that way. Does any one know if this will work before I purchase one?
Does anyone know of any other methods?
Any help will be greatly appreciated.

On Macs with built-in Optical drives, there is no supported method of installing Windows, if the Optical drive has been removed. There are possible solutions, but there are convoluted.
Here is an example - http://forums.macrumors.com/showthread.php?p=20584499#post20584499
You can put back your Optical drive temporarily, and install Windows.
Please also see the post by Billy Way in Audio Not working for Bootcamp Windows 8.1.

No sound in Bootcamp Windows 8.1

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