I have a Dell Precision M4600 Windows 7 PC with an HDMI port that I connect to a Samsung HDTV running 1080p.
I can't use the "Duplicate" function. I can use "Extend" and "Projector Only" with no problems.
So I can view web pages, movies, etc. I just can't view them on both my Laptop Screen and my HDTV at the same time. It is especially odd the "Extend" is working.
Can't duplicate display windows 7
Windows 7 duplicate display not working - Best answers