After some Win10 updates my Dell monitor stop works as 2nd Display with laptop Lenovo Yoga.
i tried different drivers for Intel HD 520 videocard, i asked help from MS support, but they think that issue with anything except windows
so, laptop connected to Monitor via microHDMI-HDMI cable and HDMI-DVi adapter.
this connection works about 1.5years and then stopped.
all same hardware works fine under Ubuntu.
MS asking to have technical report from Dell to continue investigation.
I really tired to hear from MS support that everybody guilt except their OS.
Already tried different Video drivers ( from Intel and from Lenovo)
Tried switching on/off secondary nVidia card and SafeMode
Manually install Win8 drivers from Dell.com
I have 2 laptops Lenovo Yoga 700-14 with the same monitors and the same issue.
so, question: can someone help me to resolve the issue?