The Hdmaal -

Because requires an electronically marked (E-Marker) chip in the cable to negotiate the HDMI protocol. Cheap cables are wired only for USB 2.0 data or default to DisplayPort.

| Feature | The HDMAAL (HDMI Alt Mode) | DisplayPort Alt Mode | Thunderbolt 3/4 | | :--- | :--- | :--- | :--- | | | HDMI | DisplayPort | PCIe / DP | | Best For | TVs, Projectors, AVRs | PC Monitors | Docks, eGPUs | | Audio Return | eARC Supported | No | No | | CEC Control | Yes (Remote control via HDMI-CEC) | No | No | | Common Use | Streaming, Consoles | Office, Graphic Design | Professional Workflows | the hdmaal

Before this technology existed, a USB-C port could only output DisplayPort (DP) signals. If you wanted to connect to a TV, you needed an active adapter that converted DisplayPort to HDMI. This conversion caused latency, heat, and compatibility issues (particularly with HDCP copy protection). Because requires an electronically marked (E-Marker) chip in