LG 4K monitor connecting with DP

Discussion in 'Mac Accessories' started by azzaman, Feb 14, 2017.

  1. azzaman macrumors newbie

    May 7, 2005
    Hi there,

    I am thinking of buying the LG 4k Monitor through the apple store. Obviously there has been some poor reviews but I am hopeful that things will be sorted. I will be connect it to my new 15 inch MBP Touch Bar.

    The question I have is whether I will be able to connect my wifes' HP computer with Display Port (not Mini DP). The way I am thinking is a display port adapter to HDMI, HDMI cable, then get that apple USB-C Digital AV Multiport Adapter, which I will use HDMI - USB-C (which has also got poor reviews).

    I spoke to Apple and they were "confident" that it would work, and also have rang LG who said that it would work as that monitor is plug in and play. Can anyone confirm whether this would would work or have a better idea on this. Needing my wife to connect to the monitor is only an occasional thing, mainly this will be my monitor connected to my mac, just need to have the option of connecting my wife computer to it on occasions.

    Many thanks

  2. curmudgeonette macrumors 6502a

    Jan 28, 2016
    You almost certainly won't be able to use the LG 4K with your wife's HP. You would need an adapter that bundles up DisplayPort and USB (via a USB-A connector) into a combined USB-C with DisplayPort alternate mode. And then you'd need software that communicates over USB to control the monitor settings (brightness).

    The Apple Multiport Adapter extracts a video signal from USB-C to HDMI, not the other way around.
  3. azzaman thread starter macrumors newbie

    May 7, 2005
    Thanks for the info, probably decided on the LG 27UD68-W and connect this to my MBP with the apple av multi port adapter (gets some shocking review, as in it doesn't work as it should).

    Can you think of any negatives with this set up?

  4. csurfr macrumors 68020

    Dec 7, 2016
    Seattle, WA
    Yes, I can tell you of one negative right off the rip. . 30hz. That is the refresh rate you will be getting with the Apple MultiAV adapter. You will notice tearing and severe lag in scrolling, and things that have motion. I experienced it with my display and returned it immediately. Avoid the Apple Adapter at all costs unless you're plugging in a projector for Powerpoint or Keynote. That UD68 supports DisplayPort, right? Spend $19.00 and get a USB-C -> DisplayPort adapter from Amazon if available where you are. Bonus: Your wife's computer has full size DisplayPort? Then you're the only one that needs an adapter.

    I'm using the one linked below with my 2016 13" and a 28" Samsung 4k panel and I don't have ANY issues, and it runs at 60hz. The MacBook Pro recognized it right away, scaling is there, etc.

    YMMV, but I can tell you from first hand experience that the LG 4k UltraFine with USB-C is NOT the way to go. It consistently crashed my MacBook Pro upon going to sleep. It sucks that you have to have the charger plugged in AND this adapter to DisplayPort, but it's better than the alternative, which is. . . .well... nothing right now.


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3 February 14, 2017