Switching from Display Port to HDMI Shuts Off Display Port

  1. Posts : 19
    Windows 10

    Switching from Display Port to HDMI Shuts Off Display Port

    I'm using a Dell U3415W monitor. My video card is AMD Radeon RX480. The monitor is connected via DisplayPort to my computer. The monitor is connected via HDMI to my work laptop. When I want to switch over to HDMI, it acts as if I shut off the monitor on the Displayport shifting everything over to my secondary monitor. It causes no problem, but drives me nuts because when I switch back over to DIsplayPort, I have to move my open programs around again. Is there any simple way to make this stop? If I don't use DisplayPort, and instead use HDMI/DVI combination, the behavior described does not happen. I'm guessing that is just the way it is, but I'm hoping there is an easy way to make it stop.
      My ComputerSystem Spec

  2. Posts : 1,983
    Win10 1809

    Are you using two different Resolutions ? ie is the laptop using 3440x1440 like the Desktop ?
    it sounds like the Monitor isn't resetting the Res after you switch back , you may need to hit auto adjust instead ?
      My ComputerSystem Spec

  3. Posts : 19
    Windows 10
    Thread Starter

    Yes, the two monitors use two different resolutions. If I use HDMI for both monitors, it never happens. It's only when using one with displayport. When I switch the Dell monitor over to my HDMI connection, my desktop completely switches over to the second monitor thinking it's it the only monitor connected. It must have something to do with displayport.
      My ComputerSystem Spec

  4. Posts : 1,983
    Win10 1809

    Yep weird , I have multimonitor setup too but switching inputs does not cause Win10 on the desktop to stop it's signal if I switch one monitor to DVI or HDMI etc. but I am using a Nvidia Card so not sure if that is the difference?

    maybe the way the Dell monitor handles inputs though so I'd try them for info too
      My ComputerSystem Spec


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