displays are 4k at 30hz only. graphic connects are HDMI (this shows at 4k) and DP(shows at 1080p)
Let me explain what is happening...
The Intel HD Graphics engine in your processor supports three outputs. Each of these outputs can be individually configured to support one of three protocols, DisplayPort (DP), Embedded DisplayPort (eDP) or HDMI:
So, I have provided you with an overview and explained one of the two issues that you are seeing. To address the other issue, I need some additional information:
Hope this helps,
thanks Scott. Yes I'm using a converting cable DP to HDMI and rather long at that (3m) I expect that is the culprit.I'll leave it for a future suss and live with what I get for now.