Can't select DisplayPort in Audio settings in Windows 10 on HP Zbook 15u G5

[Cal_A]

My monitor is connected to my HP ZBook 15u G5 laptop through an HP dock using a DisplayPort cable. Video is working well, but I don't have the option to select the DisplayPort audio in the Windows 10 Sound settings page. The only option I have is "Speakers (Conexant ISST Audio).

I've tried the latest video drivers from AMD and Intel as well as the drivers located on the HP website. None of them provide a playback device for the DisplayPort audio.

Device Manager does show an "Intel(R) Display Audio" device, along with some others, and it is working properly. Display adapters show both the Intel(R) UHD Graphics 620 and Radeon Pro WX3100 adapters.

How can I get audio to work over the DisplayPort connection?

[BeemerBiker]

Bring up the sound mixer and see what the output devices are.  If your monitor is listed then possibly the volume is too low.

DisplayPort carries audio and it can pass through an DP -> HDMI adapter just fine.

The above output devices include two monitors each connected to a different NVidia card.  Your monitor should be identified with graphics card it is connected to.  The above is windows 11 but 10 should be similar.

Bring up the  on-screen-display of the monitor and verify the audio is enabled and the volume is high and make sure there is no headphone or speakers plugged in.

[Cal_A · Accepted solution]

I was able to resolve my problem using the CRU utilily - Custom Resolution Utility. I created a custom extension block for the audio output and it's working now.