3 Replies Latest reply on Sep 4, 2014 4:26 PM by sylvia_intel

    Intel HD 4400 no DDC\CI communication over DisplayPort



      I am trying to calibrate my Nec monitor connected by DisplayPort using SpectraView software. I have Lenovo Thinkpad T440s with i7-4600U \ Intel HD 4400 graphics. No matter what connection I am trying (miniDP on notebook or DVI, DP, VGA in ultradock docking station) I am getting no communication over DDC\CI message in SpectraView and NaViSet software. It looks like a problem with Intel HD driver. I’ve tried latest stable Intel driver ( and drivers from Lenovo ( under Windows 8.1 pro (64bits) without a success. I’ve also tried 3 monitors (NEC PA271w, EA274wmi and Dell U2410) on this machine with different kind of software which requires DDC\CI communication with the same result = no communication over DDC. All monitors can communicate on different Lenovo notebook with dedicated ATI graphics without any problems.


      Any ideas how to enable DDC\CI communication in Intel HD driver?


      Best regards,