Hello Thomas, thank you very much for contacting us through Intel Communities.
If you are interested on how to enable DDC\CI on your system, it would be necessary to contact your software developer or monitor manufacture.
We do not provide assistance for DDC\CI profiles, further more, in order to create or add DDC\CI profiles under color management the user has to be an administrator. Restricted users are not allowed.
I found this thread on an Apple community that you may want to look at for additional information. Updating to 10.5.6 has broken DDC/CI monitor co... | Apple Support Communities
I'm actually facing the same issue on a Dell U2413 and two Dell U2713H monitors. I'm also using a HD4400 (in a Surface Pro 2).
When the monitors are in DisplayPort 1.1 mode, everything is fine. But upon switching to 1.2, the DDC/CI fails completely. Dell claims this is a video card driver issue, and that Intel would need to fix the issue.
I need to run DisplayPort 1.2 for many reasons, namely to daisy-chain my monitors (MST).
Could you please advise?