cMP resolution change after wake

Discussion in 'Mac Pro' started by macpro00, Feb 17, 2016.

  1. macpro00, Feb 17, 2016
    Last edited: Feb 17, 2016

    macpro00 macrumors member


    Feb 7, 2016
    When my 5,1 puts the monitor to sleep... after wake, the resolution changes and I can't change to normal setting. It appears everything is off centered. I have to restart my machine for it to go back to normal. I am using an old LG L246wp. Otherwise, I have to disable the sleep setting. Zapping PRAM does not solve the issue.

    --- Post Merged, Feb 17, 2016 ---
    I switched out cables/connections. Originally, I have DVI-HDMI cable. I did a shutdown and used display port-HDMI. It did not resolve the issue.

  2. macpro00 thread starter macrumors member


    Feb 7, 2016
    I changed monitors and that resolved it. Looks like my LG is not liking my Mac Pro. Oh, well.
  3. SIRmisterD macrumors member

    Dec 8, 2013
    Texas, USA
    Could it be a driver issue? I'm sure you already thought of this, but it's definitely worth looking into.
  4. macpro00 thread starter macrumors member


    Feb 7, 2016
    Yeah... been scratching my head on this one. Apparently, it is a monitor issue. Based on my findings, the EDID is what the issue is. Basically, it is how the monitor is speaking with the cMP.

    Any brave souls who have have the experience with overwriting EDID for OSX?

    Here are a couple of interesting articles:

    Script to fix EDID OSX
    Overriding EDID

    --- Post Merged, Feb 28, 2016 ---
    One more thing.... LG has monitor driver (for my specific model) available on their web site. How does one install or copy to OSX folders?

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