[lmyllari]

1) Try switching between limited and full range on your NUC with

Code:

xrandr --output HDMI1 --set "Broadcast RGB" "Full"

and

Code:

xrandr --output HDMI1 --set "Broadcast RGB" "Limited 16:235"

- does the picture change between black and grey black level?

Yes, these both work on my i3 Haswell NUC.

"Full" results in black levels that are clipped (too dark).
"Limited" results in black levels that are washed out gray.

This means that the signaling is not working. If it was, you should see no change in black level. Do you have any other video source that you could use to check that your TV supports this?

Thanks for the bug report link. If I read that correctly, it looks like Intel delivered a fix to their Linux driver on Oct. 30.

Is that patch headed to OpenELEC or somewhere we can get it?

Note the commit dates. "drm/i915: Add "Automatic" mode for the "Broadcast RGB" property" is the one that causes limited level by default with TVs, "drm/i915: Provide the quantization range in the AVI infoframe" should tell the TV to render it correctly (this is the one I suspect is not working properly on Haswell). I think OE already has them both.