Boot Menu on some large displays requiring DP1.2

Discussion in 'Mac Pro' started by haralds, Apr 30, 2018.

  1. haralds macrumors 6502a

    haralds

    Joined:
    Jan 3, 2014
    Location:
    Silicon Valley, CA
    #1
    I have a Radeon 7970 driving a Dell U3818DW at 3840x1600. Nice curved display that works great using DP1.2.

    But no boot menu. Somebody else on this forum suggested forcing Dp1.1. The regular manual had no such option, but after some googling I found the solution.
    - Pop the on screen menu
    - Go to select the input
    - Select DP
    - Hold the Check Mark button for 10s.
    The first time it will toggle to DP1.1, the second time back to 1.2

    Confirmed getting the boot menu!
     
  2. Zeke D macrumors 6502a

    Zeke D

    Joined:
    Nov 18, 2011
    Location:
    Arizona
    #2
    good to know, I have a Samsung 4k screen, and I'm not getting the boot screen. I'll try this out.
     
  3. haralds thread starter macrumors 6502a

    haralds

    Joined:
    Jan 3, 2014
    Location:
    Silicon Valley, CA
    #3
    Took forever fiddling...
    Google is helpful, once you get past the placed ads etc.
     

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