I have an Acer 27" monitor with HDMI/D-Sub/DVI inputs. It works well with my camera, Macbook (using a DisplayPort to HDMI adaptor), Playstation3, Chromecast, Apple TV etc.
I recently got a Lenovo Thinkpad Yoga 260 and try as I might I can't get the Monitor to detect it. I have tried various combinations of HDMI cable and monitor and find that the Yoga is happy to output HDMI to my TV and my two Samsung monitors.
Has there been a change in the HDMI spec that might explain this? Or anything else? I am baffled. And angry as the warranty expired on the monitor a few months ago. Not that there's anything wrong with it - the issue only arises with this one laptop.