No audio or Fn-Keys despite Boot Camp's driver installation

These are the hardware IDs I read out from the details tab:

PCI Memory Controller

PCI\VEN_8086&DEV_A121&SUBSYS_72708086&REV_31

PCI\VEN_8086&DEV_A121&SUBSYS_72708086

PCI\VEN_8086&DEV_A121&CC_058000

PCI\VEN_8086&DEV_A121&CC_0580

SM Bus Controller

PCI\VEN_8086&DEV_A123&SUBSYS_72708086&REV_31

PCI\VEN_8086&DEV_A123&SUBSYS_72708086

PCI\VEN_8086&DEV_A123&CC_0C0500

PCI\VEN_8086&DEV_A123&CC_0C05

If I look the text strings up online I get matches on different drivers websites, but not knowing them I am reluctant to simply download something and install it.

What I did notice, is that both devices seem to be related to intel, apparently.

In the BootCamp folder I have the following Intel drivers:

ManagementEngine contains a setup.exe that I executed before, but to no avail.

Under WindowsSupport I have additional candidates:

The folder namen "IntelSerialIO" has two subfolders: "CannonLake" and "SkyLake"

The "IntelChipset" folder contains several subfolders (presumably one for each different chipset) as well as a "Readme.txt". This text file refers to a "SetupChipset.exe" which is not included in the Download from Bootcamp.

Investigating a bit online I saw that Intel offers a driver and support assistant. It might be worth giving it a shot... I will try it out tomorrow unless you have a better plan :) I really gotta go to bed now

Hello LonerT,

I downloaded the drivers, which come packed in a .cab file. For some reason I cannot install it: there is no option for that in the context menu and the installation fails through the command promt (apparently it cannot find the file, even though the path is right).

What I did see, though, is that inside of the .cab file are the same drivers that BootCamp downloaded under "WindowsSupport\$WinPEDriver$\IntelChipset". The names of the folders inside seem to refer to the chipset the computer has.

I checked online for my processor's name and got to this website. My processor (Intel i7 7700k) is based on the Kabylake platform but uses the Chipset SunrisePoint, so I used the .inf file under "SunrisePoint-H" for the device "PCI Memory Controller" (PCI\VEN_8086&DEV_A121). Now it shows as "Intel(R) 100 Series/C230 Series Chipset Family PMC - A121". I suppose PMC stands for PCI Memory Controller and the "A 121" at the end matches the hardware ID. So that looks good to me!

The same .inf file works as well for the device "SM Bus Controller", which now shows as "Intel(R) 100 Series/C230 Series Chipset Family SMBus - A123" (A123 is part of the hardware ID).

So, as of now, there are no further unknown devices in the device manager!!

Unless something of what I said here seems wrong to you (i didn't notice anything strange so far), I would say that the issue is resolved and would like to thank you for your patience and fantastic support!

I will mark one of your first answers as the solution for this issue because it sent us on the right direction, even though the solution was slightly different for the different devices. I hope this thread helps anyone with a similar problem

Update: For "Bluetooth USB Host Controller" the proper Driver was "AppleBluetoothBroadcom". After installing this driver the Fn key are working again and Boot Camp Control Panel shows the tab "Keyboard" again!!

There is nothing else not working, at least that I am aware of.

Still, if possible, I would like to find proper drivers for the two remaining devices.

Loner T, thank you SO MUCH for the support so far!

Hello Loner T,

thanks a lot for the quick answer!

I am facing troubles booting back into my original Windows installation. I might have broken something getting my external SDD to work... Let me sort this out and I will come back with screenshots of Windows Device Manager.

That didn't work, unfortunately. I think I damaged the EFI volume when I fiddled around to get the external SSD to work. I tried to restore the EFI partition through the command line but bcdboot fails. If I cannot get it fixed I will reinstall windows in the internal HDD so that we can continue with the original question. Sorry for the detour :)

Hello again Loner T,

so, I did reinstall Windows in the internal HDD so that we can compare the devices.

See picture below.

• As you expected, the hardware for audio shows differently between the internal HDD and external SSD (please ignore the entries for the SteelSeries on the SSD. I connected them to test the sound)
• Also, in the SSD there are only 2 entries unter "Keyboards". In contrast, the HDD shows 3 (I don't know if this is relevant towards my problem not being eable to use the Fn keys properly)
• Additionaly, I saw 3 entries under "Other devices" on the SSD that do not appear on the HDD.

Is there a ways to help the device manager to properly identify the hardware that you can think of?

Just the two unter "Other devices": "PCI Memory Controller" and "SM Bus Controller". Everthing else is up and running.

I went over the devices in the internal HDD, especially unter "System devices" (where I would expect them to be) but couldn't find them.

Online I found some website refering to Intel's setup under BootCamp/Drivers, so I went and gave \WindowsSupport\BootCamp\Drivers\Intel\ManagementEngine\SetupME.exe, but that didn't seem to change anything. The other folder uner Intel is "Thunderbolt", but I don't think that would be it.

Any suggestions?

I'll have a look at the PID/VID, thanks for the tip.

Is there a way we can make Windows properly recognise the Cirrus device so that Boot Camp can then install the drivers?