Will a USB-C /Thunderbolt Connected Monitor Work During POST?

  1. hsehestedt's Avatar
    Posts : 2,212
    Windows 10 Pro, 20H2
       #1

    Will a USB-C /Thunderbolt Connected Monitor Work During POST?


    Graphics displayed via the built-in graphics from an Intel CPU or a graphics card installed in a PCIe slot get initialized at boot so that you can see the display prior to booting Windows. Graphics adapters that are connected via USB require a Windows Driver from DisplayLink and therefore are not initialized until Windows is loaded. However, I have no experience with native USB-C / Thunderbolt graphics. Does anyone know if these initialize at boot or will they only work once Windows is booted?

    I'm looking at a monitor that has a native USB-C connection but I want it to work before Windows is loaded so I can do things like go into the BIOS without needing to connect a different monitor.
      My Computers


  2. Posts : 810
    Win10
       #2

    My laptop with Intel graphics will output to my external monitor over USB-C before Windows is loaded. However, I need to first configure it in BIOS setup to do so.

    Will a USB-C /Thunderbolt Connected Monitor Work During POST?-image.png
      My Computer

  3. hsehestedt's Avatar
    Posts : 2,212
    Windows 10 Pro, 20H2
    Thread Starter
       #3

    Thanks for the response. That is very helpful.
      My Computers


  4. Posts : 7
    Win10
       #4

    I'm using a thunderbolt dock with my new X1 carbon and it does output video to my monitors, however the dock also has a power button, so there might be something special going on under the hood.

    Unfortunately, about half the time it does not initialize my keyboard, so I have to open the laptop to enter my bitlocker password.
      My Computer


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 08:05.
Find Us




Windows 10 Forums