nMP, LG 34UM95 display, Thunderbolt/bc Win 8.1 problems

Discussion in 'Mac Pro' started by Superfly503`, Nov 23, 2014.

  1. Superfly503`, Nov 23, 2014
    Last edited: Nov 23, 2014

    Superfly503` macrumors newbie

    Jun 11, 2012
    If I have my LG 34UM95 Ultrawide display attached with Thunderbolt, when I hold down the option key on restart to choose boot disk, I get blank screen/no signal. If I do the same connected with HDMI instead, I get the screen showing startup choices.

    Similar problem using boot camp / Windows 8.1. If I go through the process of using HDMI video to boot into Windows, I can use the split screen feature to show both Thunderbolt and HDMI inputs, and sometimes I can see the Thunderbolt screen showing a mirrored desktop, other times it remains dead, black. I've tried unchecking "Fast Start", didn't seem to change anything.

    I'd like to only use Thunderbolt for video, but I can't boot into Windows without switching to HDMI. I'd be interested in any info or suggestions.
  2. Superfly503` thread starter macrumors newbie

    Jun 11, 2012
    thanks for the redirect, that didn't turn up in search for some reason

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