bootcamp driver issues

Question

Level 1

9 points

bootcamp driver issues

okay so i installed windows to go onto an external hard drive and i can boot into it just fine with holding down the options key and selecting efi boot. Everything works fine but i have 3 problems after installing bootcamp drivers(the latest 5.1.5621) :

1) the sound doesn't work

2)Cant adjust the brightness and in setting it says disabled

3)whenever i install the intel graphics and its about to complete a blue sad face appears and says system_thread_exception_not_handled(igdkmd64.sys) but when i remove the intel folder from drivers in bootcamp, the setup runs fine bt still no brightness nor sound

Can someone please help me solve this ?

Thanks

MacBook Pro, OS X Yosemite (10.10.1)

Posted on Jan 28, 2015 6:55 AM

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Answer 1

Rudegar

Level 10

170,544 points

Jan 28, 2015 8:44 AM in response to Mridang

try reinstalling the various drivers like sound drivers from the sub dirs and video drivers and the likes it sounds like the drivers were not installed correctly

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Answer 2

Mridang Author

Level 1

9 points

Jan 28, 2015 10:35 AM in response to Rudegar

hii tnx fir the reply

i tried it a number of times bt it doesn't work every time i get the sad face... i tried reinstalling windows entirely still no luck 😟

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Answer 3

Loner T

Level 9

59,471 points

Jan 28, 2015 6:58 PM in response to Mridang

What year/model is your Mac? On preUEFI Macs, installing Windows using EFI Boot, results in Graphics and Audio issues, because preUEFI Macs expose some of the hidden devices using only the CSM-BIOS layer which an EFI boot cannot see. CSM-BIOS also hides the integrated GPU and exposes only the discrete GPU, which the EFI layer cannot manage.

Using 5.1.5621 is not a solution, if it does not support your Mac model. Please verify which version you need using Boot Camp: System requirements for Microsoft Windows operating systems - Apple Support.

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Answer 4

Mridang Author

Level 1

9 points

Jan 29, 2015 4:10 AM in response to Loner T

My macbookpro is a 15 inch late 2011 model.. so is it the preUEFI model (beginner 😝)

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Answer 5

Loner T

Level 9

59,471 points

Jan 29, 2015 4:24 AM in response to Mridang

Please do not post serial numbers on the forum.

From BC Info.plist

<key>PreUEFIModels</key>

<array>

<string>MacBook7</string>

<string>MacBookAir5</string>

<string>MacBookPro10</string>

<string>MacPro5</string>

<string>Macmini6</string>

<string>iMac13</string>

</array>

From How to identify MacBook Pro models - Apple Support your MBP is 8,2, so it is preUEFI.

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Answer 6

Mridang Author

Level 1

9 points

Jan 29, 2015 12:02 PM in response to Mridang

Ok.. But when i run msinfo32 on windows it says bios as uefi(why's that if its a preuefi model) .. And is there anyway i can run windows to go properly or will i have to cope with these issues?

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Answer 7

Loner T

Level 9

59,471 points

Jan 29, 2015 12:49 PM in response to Mridang

You used EFI install, so the msinfo is returning the EFI status from it. Your machine is preUEFI but has an EFI installation, hence your GPU and Audio do not work.

Can you install in Legacy BIOS mode? This is the non-EFI installation, using Bootcamp Assistant.

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Answer 8

Loner T

Level 9

59,471 points

Jan 29, 2015 1:22 PM in response to Mridang

Here are screen shots from my 13" 2012 MBP which has W8.1 installed in legacy mode.

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Answer 9

Mridang Author

Level 1

9 points

Jan 30, 2015 5:03 AM in response to Loner T

how to install it in legacy boot ? (as i said beginner 😝)

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Answer 10

Loner T

Level 9

59,471 points

Jan 30, 2015 6:17 AM in response to Mridang

Can I suggest starting at How to install Windows using Boot Camp - Apple Support ?

If you let Bootcamp Assistant partition your internal disk, it defaults to Legacy BIOS Mode.

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Answer 11

Mridang Author

Level 1

9 points

Jan 31, 2015 6:38 AM in response to Loner T

Thank you loner t

just one more question.. i have changed the info.plist so i can make the bootable usb drive from within bootcamp but when the mac restarts it gives an error no bootable device found but when i insert the windows installation cd it recognizes and boots it.. Also when holding the option key gives "efi boot" on usb and "windows" on cd... Why is that?

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Answer 12

Loner T

Level 9

59,471 points

Jan 31, 2015 6:52 AM in response to Mridang

1. Modifying the Info.plist addresses just the first step of creating a bootable device, but does not (and cannot address) what BCA sets to be the next boot device in the Mac NVRAM. This is derived from the Mac Model Identifier, irrespective of your current hardware and its status. This causes grief for people who have a broken built-in Optical drive.

2. You should not create a USB, if your model has a built-in Optical drive. There are a couple of Mac models, notably the 2012 models, which can support both methods. This list is very limited and BCA implements this logic by reading info.plist. Modifications can cause BCA to misbehave, as you have already observed in your case.

3. Do not use EFI boot on preUEFI models, it just brings pain. If you want to play with PCIe registers in hardware, you are more than welcome to try. Read MacRumours for guides. I personally see no benefit, except the pleasure of reverse-engineering in such attempts.

4. The DVD/CD media is booting under CSM BIOS control and has been instructed to boot in Legacy mode, hence no EFI, even though the directory exists on the USB and DVD, both. You can check that on the DVD itself.

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Answer 13

Mridang Author

Level 1

9 points

Jan 31, 2015 7:28 AM in response to Mridang

.

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Answer 14

Mridang Author

Level 1

9 points

Jan 31, 2015 7:30 AM in response to Loner T

4. The DVD/CD media is booting under CSM BIOS control and has been instructed to boot in Legacy mode, hence no EFI, even though the directory exists on the USB and DVD, both. You can check that on the DVD itself.

so if it exists on both cant i just boot it from the usb

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Answer 15

Loner T

Level 9

59,471 points

Jan 31, 2015 7:38 AM in response to Mridang

The Apple Bootmanager looks for EFI boot, which is its native default. Booting from USB still does not address the NVRAM setting.

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