Regarding High Definition Audio device HardwareID



Our product uses customized Hardware which supports Windows 10 IOT Enterprise OS

By default my High definition Audio device Hardware ID is :HDAUDIO\FUNC_01&VEN_111D&DEV_76D9&SUBSYS_103C184B&REV_1001 but sometimes with multiple restarts the Hardware is getting changed to different ID. Some thing like 'HDAUDIO\FUNC_01&VEN_111D&DEV_76D9&SUBSYS_80860101&REV_1001

It is not happening frequently. Only sometimes when the system is restarted id is changing.
It would be great if someone helps me out why windows is changing this hardware ID.


Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
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Accepted answer
  1. AliceYang-MSFT 2,086 Reputation points

    If when your application gives results “Audio device failed” but the device still works. We could let it go and adjust the criteria of your application for “Audio device is good” as Annabooks suggests.

    One device may have multiple Hardware IDs and use different IDs in different situations. For example, the most compatible ID is ID1. But there are less compatible ones, ID2, ID3…When driver that matches less compatible ones is found earlier, it’s used and device works. Vice versa. I think it’s the reason why you see changing hardware IDs in event log.


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  1. Sean Liming 4,591 Reputation points

    As Alice pointed out, the Audio driver hardware ID can be seen in Device Manager. What and where is this other Hardware ID that you are comparing too?

    Hardware ID's shouldn't change since they are needed to load the device driver. The master OS hardware ID is something different that is used for activation

    Some times different stepping of silicon has different compatibility IDs: SUBSYS_CC823D27&REV_1001\4&1A9CE985&0&0001. If you look in the audio drivers INF file, you will see a list of PnP IDs many with the core VEN\DEV but with different SUBSYS_. For example, the audio driver you are using is from IDT. Checking one of the IDT drivers I have, the following list of PnP IDs in the INF file:


    There are different SUBSYS for the same VEN\DEV ID. Your application should really be checking to see if the driver is working correctly by checking the driver status based on the VEN\DEV - HDAUDIO\FUNC_01&VEN_111D&DEV_7675.

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  2. S.Sengupta 17,136 Reputation points MVP

    A unique HWID number is generated when the OS is first installed on the computer as a part of Product Activation. It identifies the hardware components that the system is using, and this number is communicated to Microsoft.

    With each restart the OS will generate a different HWID number and compare it to the original to make sure that the operating system is still running on the same device.
    The reason behind HWID is to ensure that the operating system is not being used on any device other than the one for which it was purchased and registered.

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