Hi Sylvia
Any news on this issue? I think we are quite some people who are waiting for an answer about this issue. I too bought the NUC with the intention of using it with a monitor capable of doing 3840x2160@60hz. The mode is selectable with the newest Linux drivers. But I get no signal on the monitor, when using this mode.
At least it would be nice to know, if it is not doable - then we won't be waiting in vain.
/Morten