Acp Hda Node -

Built-in speakers work, but no sound from external monitor via HDMI or USB-C DisplayPort. Cause: The GPU's HDA controller (handling HDMI audio) conflicts with the ACP HDA Node. The OS sends audio to the wrong node. Fix (Linux): Use pavucontrol (PulseAudio) or alsamixer (ALSA) to switch the audio profile from "ACP HDA Node" to "HDMI HDA Node." Or blacklist the ACP module temporarily:

The (Audio CoProcessor High Definition Audio Node) is a virtual hardware component found in modern AMD-based systems, such as Ryzen laptops and NUCs. It acts as a bridge between the AMD Audio CoProcessor (ACP) and the standard High Definition Audio (HDA) controller, enabling advanced audio features like digital microphone arrays and low-power audio processing. acp hda node

In the Linux kernel (specifically for snd-acp drivers), an ACP HDA Node manages the bridge between the AMD ACP (Audio CoProcessor 6.x/3.x) and the Intel HDA link. This node is responsible for offloading audio DSP tasks from the main CPU. Built-in speakers work, but no sound from external