UltraFine 4K bluescreen when restarting or shutting down

Discussion in 'Mac Accessories' started by huschpuscheli, Oct 3, 2017.

  1. huschpuscheli, Oct 3, 2017
    Last edited: Oct 3, 2017

    huschpuscheli macrumors regular

    Jul 28, 2011

    i've experienced a weird thing with my ultrafine 4k (3.10,3.4,... firmware) which is connected to a tbMBP running high sierra: when i shutdown the computer or restart it, the ultrafine gives me a greenish bluescreen. i've made a video to illustrate it:

    what do you think?

    thank you for your help.
  2. bcaslis macrumors 68020

    Mar 11, 2008
    I've seen the same thing with High Sierra though it did not do this with Sierra. My guess is that it's just a graphics artifact with the changes in High Sierra.
  3. Fishrrman macrumors P6


    Feb 20, 2009
    Does the monitor run ok otherwise?
    Is this ONLY when you shut down, and ONLY for a second?
    Does it always "come back up" when you reboot?
    No problems awaking from sleep?

    If so, I wouldn't worry more that 2 seconds over it.
    There are far worse things in this world to be worryin' over...
  4. huschpuscheli thread starter macrumors regular

    Jul 28, 2011
    yes, even though i'm noticing random white distortions across the screen (like a white bar) for a split of a second since the high sierra update which i cannot reproduce.

    yes, before shut down or restart.


    no problems here.
  5. bcaslis macrumors 68020

    Mar 11, 2008
    FYI, I've also seen the green screen sometimes when restarting the MBP and it's not attached to the LG monitor. So I'm pretty convinced it's just a High Sierra "feature".

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