Windows 10: usb c dp alt mode not working on my laptop

Discus and support usb c dp alt mode not working on my laptop in Windows 10 Drivers and Hardware to solve the problem; 0I bought a laptop because it has a type-c display port feature, in order to easily change between my MacBook pro and laptop and work with my external... Discussion in 'Windows 10 Drivers and Hardware' started by Ruslan Leshchenko, May 18, 2023.

  1. usb c dp alt mode not working on my laptop


    0I bought a laptop because it has a type-c display port feature, in order to easily change between my MacBook pro and laptop and work with my external display.I faced an issue in that the type-c display port doesn't work on my laptop.The monitor is MSI Optix MAG274QRF QD, the cable is THUNDERBOLT 3 USB-C CABLE 0.8M APPLE MQ4H2ZM/A, the laptop is GIGABYTE G5 KDWhen I tried to update all drivers from the official site, I faced new interesting issue.Prerequisites:My laptop is turned onMonitor is plugged into the laptop by a type-c display portSteps to reproduceusb c dp alt mode not working on my laptop :Download SerialIO-Intel [30.100

    :)
     
    Ruslan Leshchenko, May 18, 2023
    #1
  2. dalchina Win User

    Looking for some way to determine if a USB-C port supports Alt Modes

    Well, there should be some symbols:
    How do you check which type of USB-C port my laptop has? - Coolblue - anything for a smile

    There appear to be professional conformance checkers of course...

    FYI: (probably seen these)
    Definitive Guide to USB-C Alternate Modes - Cable Chick Blog
    How to Enable DisplayPort Alt Mode over a USB Type-C Cable - Total Phase Blog

    Just a few thoughts..no answer as such...
     
    dalchina, May 18, 2023
    #2
  3. Choose between DisplayPort and HDMI alt usb c dock

    See the manual: https://m.media-amazon.com/images/I/C1336xuJZCS.pdf

    "Note: Before using this product, please confirm your laptop supports DisplayPort Alt Mode and Power delivery."

    "The following connections are not feasible and will result in no video output or recognition: VGA to HDMI adapter or HDMI to DP adapter, USB C Female to USB Male Adapter, Type C Extension Cable."

    "Basic Troubleshooting Techniques
    1. There’s no video output after connecting the product. Please confirm whether your laptop supports DisplayPort Alt Mode online or contacting the manufacture of your laptop. If you laptop does support Display Alt Mode, but you still cannot get video output, please troubleshooting the product or HDMI/VGA cable. For example, you can plug a USB device into the product, if it works, the problem may lie with the host USB-C port of your laptop."


    Etc.

    I'm certain its a usage issue such as the above.
     
    --dashdotdot, May 18, 2023
    #3
  4. usb c dp alt mode not working on my laptop

    DisplayPort over USB-C

    Yes, that should work. You already noted that your system states that the USB-C port will do DP 1.4. Note that not every USB-C port has this capability. In order to carry a DP video signal a USB-C port must support "DP Alt Mode".

    Here is a good article coving this topic:

    Definitive Guide to USB-C Alternate Modes - Cable Chick Blog
     
    hsehestedt, May 18, 2023
    #4
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usb c dp alt mode not working on my laptop

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