Displayport Alt Mode

In the two lane mode the alt mode for displayport protocol can support 4k resolution at 60 hz or hdr 4k at 60 hz using 4 2 0 and 12bpp. Displayport alt mode dp alt mode allows a usb c equipped computer to connect directly to a display or monitor. If all four lanes are used to enable alt mode for displayport it will allow displayport to operate at its full performance at up to 8k x 4k at 24bpp 60hz refresh 4 2 0 format for one display per the displayport 1 4 specification.

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Usb type c power delivery is bi directional so a device can either send or receive power.

Displayport alt mode. April 29 2020 the video electronics standards association vesa today announced that it has released version 2 0 of the displayport. Usb type c ports support adapters that can output different types of video such as hdmi vga and displayport all from one usb type c port on your computer or device. 4k 60hz 24 bit color without compression with simultaneous usb 3 1. The device or dongle you connected to has new features for usb c that your pc or phone doesn t support.

For example a displayport alternate mode adapter should be connected to the usb c port on your pc or phone that supports displayport alternate mode. Audio is usually also supported as a part of the protocol for screens with built in speakers. Usb type c power delivery usb pd. Displayport alt mode version 2 0 enables all of the latest capabilities of displayport through the usb type c connector including beyond 8k resolution and higher refresh rates along with usb data delivery san jose calif.

Windows 10 reportedly does have the displayport alternate mode through the usb type c 3 1 port. Video superspeed usb and power all on one connector. Usb c alternate mode to a hdmi or displayport monitor offers video and audio only. Usb type c video modes alternate mode.

You can still use a usb c equipped laptop with monitors that have more traditional video ports such as vga dvi hdmi and displayport but you will need to get a usb c video adapter. Displayport leverages the alternate mode functional extension of the usb type c interface and shares similar electrical characteristics with usb 3 1 allowing use of common system elements. In february 2017 vesa and qualcomm announced that displayport alt mode video transport will be integrated into the snapdragon 835 mobile chipset which powers smartphones vr ar head mounted displays ip cameras tablets and mobile pcs.

Displayport alt mode offers dp v1 2 v1 4 or v2 0 connectivity depending on the hardware for video connections anywhere from full hd 1080p up to 8k 60hz over usb c. The device you connected to has new features for usb c that the cable doesn t support. Support for displayport alternate mode over usb c. Upon reading a number of webpages i suspect that this could be a software issue since there apparently is a displayport alternate mode that needs to be somehow enabled through the usb 3 1 c port but i have no idea how to do that.

The monitor will need to have a usb c port for you to make this connection.