1.    2 Weeks Ago #1
    Join Date : Jul 2015
    Posts : 115
    Windows 10 Pro 64bit

    Is it possible to prevent windows from auto detecting second monitor!?

    I was wondering if there is any way to prevent windows to automatically detect a second monitor attached.
    In my case it's a TV and whenever I turn my TV on the PC display goes out for a second and comes back setting
    itself to Dual or extended mode. I would love to prevent this from happening as most of the time I am not going
    to project on the TV. It would be nice to be able to manually change from PC ONLY display, to Extend, Duplicate or
    second screen only, depending on your needs.
      My ComputerSystem Spec
  2.    2 Weeks Ago #2
    Join Date : Jul 2015
    Posts : 115
    Windows 10 Pro 64bit
    Thread Starter

    Thanks for the fast move MR super moderator. This is not a graphic card issue or problem! Its a general windows behavior.
    But still nice that you like to keep the place so tidy.
      My ComputerSystem Spec
  3.    2 Weeks Ago #3
    Join Date : Jul 2014
    Posts : 10,454
    W10 Insider + Linux

    It's still a function of GPU driver, must have some settings there.
      My ComputersSystem Spec
  4.    2 Weeks Ago #4
    Join Date : Oct 2014
    New Jersey
    Posts : 1,387
    Windows 7 Pro x64 Windows 10 Pro x64

    Just disconnect the tv if you don`t use it that often, that`s all I do. Takes 1 second to remove the HDMI cable.

    Maybe uncheck one of the monitors here in the nvidia control panel, as suggested.
    Attached Thumbnails Attached Thumbnails Capture.JPG  
      My ComputersSystem Spec
  5.    2 Weeks Ago #5
    Join Date : Jul 2015
    Posts : 115
    Windows 10 Pro 64bit
    Thread Starter

    Thanks for the responses. Unchecking the TV dose not work because as soon as you turn on the tv it automatically recheck and enables it.
    Yes indeed removing hdmi cable could be a solution. But it's hardly accessible behind my desk and also I watch at least one movie every night on my TV. So it's not that practical to disconnect and reconnect every day.
    I searched for an answer on the net and did not find a solution, so I knew there is not a simple one click answer. I was just hoping that one of the advanced users here would come up with a solution (registry edit or .....)
      My ComputerSystem Spec
  6.    1 Week Ago #6
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,447
    Windows 10 IoT

    Just press the Windows logo key and P on your keyboard and select PC Screen Only. And when you do want to use it, do it again and select Extend etc. I just put shortcuts on my taskbar. I switch to PC only when gaming and back to Extend when done. Just the one mouse click to switch modes.
      My ComputerSystem Spec
  7.    1 Week Ago #7
    Join Date : Nov 2016
    Posts : 437
    Windows 10

    Another way, 3 clicks.
    Click Notifications > Project > PC screen only.
    You can customise what appears in there by going to Settings > System > Notifications & actions.
    Another way
    Settings > Display > Multiple Displays
    The Windows way should remember your last settings.
      My ComputerSystem Spec


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