This message was posted on behalf of Intel Corporation
I understand you are having issues while connecting an HDMI monitor to the laptop. I would need more information on your system; if it is possible to send me the results of Intel® System Support Utility.
Intel® System Support Utility
Let me know the resolution that you are using with the HDMI display.
Hi, thanks for the reply!
I recently found out that once I connect the monitor, NVIDIA (a GTX980M) takes over automatically so I suppose it has nothing to do with Intel HD. The lag was originated, surprisingly, by Google Chrome. Once I turned off Hardware acceleration it came back to normal.
I should have deleted or updated the question, sorry to bother you :/