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How to Fix the AMD High Definition Audio Device Issues
https://www.minitool.com/news/amd-high-definition-audio-device.html
It is used to send sound through HDMI and Display Port connections. Maybe, you are interested in this post - DisplayPort VS HDMI: Which One Should You Choose. AMD Radeon HD, Radeon R9, Radeon R7, and Radeon R5 series graphics cards have built-in support for AMD high-definition audio.
Cannot get sound through DisplayPort on AMD rx480 ...
https://bbs.archlinux.org/viewtopic.php?id=272726
My card is able to output sound through DisplayPort, and appears as "Ellesmere HDMI Audio [Radeon Rx 470/480 / 570/580/590]" in the sound settings on Gnome. This is the output of pactl list sinks: Sink #0 State: IDLE Name: alsa_output.pci-0000_01_00.1.hdmi-stereo-extra4 Description: Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] Digital ...
Solved: Dell U2410 DisplayPort Audio - Dell Community
https://www.dell.com/community/Monitors/Dell-U2410-DisplayPort-Audio/td-p/3357392
Do all current Dell Monitors with a DisplayPort support audio output? In particular the the U2410. The Reason for the question is that I own an ATI Radeon HD5850 Video Card and I am using the DisplayPort connection. I have installed the latest drivers (Catalyst 9.12) which mention "The ATI Catalyst ...
Using DisplayPort for PC to monitor w/ built-in speakers ...
https://gamefaqs.gamespot.com/boards/916373-pc/70489068
My monitor acepts audio via displayport. My GPU is a radeon 5770. I'm using a standard displayport>displayport cable, and it should work, but I can't figure out how to set my PC to send audio output through displayport.
Solved: I lost audio after updating the display driver ...
https://community.amd.com/t5/drivers-software/i-lost-audio-after-updating-the-display-driver/td-p/403981
Rather than using my speakers (3.5mm connection to the jack port behind my PC) with the onboard sound drivers, it seems the update has decided to use the woeful, despicable built-in speakers on my monitor, running AMD's drivers. I've been to my sound control panel in an attempt to re-select my speakers, but lo they are nowhere to be seen.
No Sound with DisplayPort or HDMI Video Cable …
https://www.dell.com/support/kbdoc/en-ca/000125484/no-sound-with-displayport-or-hdmi-video-cable-connection
When an audio-supported video cable is being used such as a DisplayPort or HDMI cable, Windows may change the default audio playback device to the audio-supported cable assuming that another audio device is being used. The issue may occur when a laptop is coming out of sleep mode as the system is detecting the audio-capable cable first.
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