How to prevent audio devices from blocking computer going to sleep?

As per image below and question above :



There's no option for me to toggle whether this device can prevent my PC from going to sleep.

I also don't understand why "HD Audio" is in use even though NOTHING is playing in the background.

How can I resolve this?

Lastly, what is a Legacy Kernel Caller?

How do I know what "USB Audio Device" this is referring to?

I'm on most updated win10 x64.

Have you checked---settings>system>sound---to see if any of those options are helpful?
Look in Reliability History to see if there are entries covering the problem.
Go through the sound pages in ---dxdiag---expanding any entries there and see if any faults are recorded.
Also,run ---sfc /scannow---and ---dism /online /cleanup-image /restorehealth---to eliminate any file corruption.

In the Search Box,bottom left,type in ---Reliability history---.The programme should appear after one or two letters.
If all devices show as normal,then either the cabling or sockets could be the culprit.

The solution here is to override the driver's requests to stay awake.

Fire up an elevated (administrator) command prompt and use the command POWERCFG /REQUESTSOVERRIDE to override any process or service that you discover is sending wake requests:

POWERCFG /REQUESTSOVERRIDE [<CALLER_TYPE> <NAME> <REQUEST>]

Description:
Sets a Power Request override for a particular Process, Service, or Driver.
If no parameters are specified, this command displays the current list of
Power Request overrides.

Parameter List:
<CALLER_TYPE> Specifies one of the following caller types: PROCESS,
SERVICE, DRIVER. This is obtained by calling the
"POWERCFG /REQUESTS" command.

<NAME> Specifies the caller name. This is the name returned from
calling the "POWERCFG /REQUESTS" command.

<REQUEST> Specifies one or more of the following Power Request Types:
DISPLAY, SYSTEM, AWAYMODE.

Examples:
POWERCFG /REQUESTSOVERRIDE PROCESS wmplayer.exe DISPLAY SYSTEM

didn't work for me..

AddRAM said:

I would start with unplugging that audio device. CABLE-A Output etc.

it's a software driver which I need to keep ALWAYS ON.

any other workaround?