The DP port in your NUC has DP 1.2 type output while your monitor input is set by default to DP 1.1. In order to avoid display blinking enable DP 1.2 in your monitor DISPLAY settings menu. See the attached image.
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4k@60hz is not possible on DP 1.1 it has to be DP 1.2 otherwise you are stuck with 30hz.
The monitor I had has got a different menu anyway there is no "DP 1.2" instead it's called "MST" and it's currently "Off".
For whoever bother trying to replicate the issue: it flickers massively when I try to play 4k x265 video with "Films & TV" but Windows Media Player is fine.
I understand - setting the MST to OFF is correct for 4k@60hz. What kind of DP cable are you using? Are you using the supplied in the box mDP to DP cable? If not, try to use it.
I'm using a conversion cable where on one end it's USB-c and on the other is full size DP. From what I read on the internet the original mDP to DP cable is often blamed for instability. In fact a lot people went as far as to dump the original cable the first thing the monitor arrives. In any case, the thing is fine with Windows Media Player so I would doubt it's a cable issue.
Just found another application that's causing constant flickering.
Every time I open a new tab in Google Chrome the screen flickers.
This is a nightmare...
Tried a number of different video players here's what happened.
1. Films & TV - flickers every other second.
2. Windows Media Player - fine but no sound (I guess it hasn't got the codec?).
3. VLC - no hardware acceleration.
4. MPC-HU - fine.
5. MPC-BE - fine.
6. Kodi - flickers every other second.
I work for Intel Customer Support and I want to let you know that we are aware of screen flashing and/or flickering issue when using 4K resolutions on NUC7ixBN systems.
This issue has been reported and engineering is working on finding a solution for it.
I am trying to locate all community threads related to this issue to refer them back to the following one and consolidate: NUC7ixBN Screen Flashing/Flickering when using 4K resolutions <https://communities.intel.com/thread/116824> We will keep this community thread updated with any progress we make.
I apologize for any inconvenience this may have caused or is still causing and I appreciate your help and patience.
I will be locking up this thread to make sure all comments are properly tracked and followed on NUC7ixBN Screen Flashing/Flickering when using 4K resolutions