Thanks for the logs. It looks like you have an HP Omen 27" monitor which uses GSync. We have found that some of these are out of spec on DisplayPort and I think this is what is causing the issue you are seeing. We are working to see what further things we can do to support GSync monitors which do not appear to fully adhere to the DisplayPort spec, but cannot commit to being able to work around this at this time. I'm afraid at the moment you would need to use a different monitor with the DisplayPort outputs on the D6000 dock.
Sorry I wasn't able to be of more help!
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