Hi Mendietinha!
I'm using the flag IGPlatformID = 01660003 would it? 1080p HDMI port works but the notebook screen is with artifacts , if I change from 1080p to 720p both work without the artifacts but at 720p , but for this to work I have to go there in the display settings , putting 1080p and return 720p as soon linking it comes with independent video configuration artifacts. Remembering that I am using the original kext AppleIntelFramebufferCapri unedited in Yousemite .