- May 22, 2015
- Intel NUC5i5ryh
You must be certain.
Plug one device in, then look at ioreg. That will tell you which framebuffer index it is attached to.
@1 directly corresponds to patches you may do with framebuffer-con1-*
@2 directly corresponds to patches you may do with framebuffer-con2-*
At AppleIntelFramebuffer@1 shows Boolean True
Edit: After using -igfxnohdmi, again during boot i loose signal BUT i reconnect hdmi cable, proceed with my password (i get the ugly 1080p resolution 60 hz and no hdmi audio as expected) and i reconnect the displayport cable and finally i get 4k resolution 60hz.
Also after using -igfxnohdmi AppleIntelFramebuffer@2 shows Boolean True in IORegistry
Note: i also removed -cdfon boot argument, i thing it made no difference, only -igfxnohdmi did something new.
I think that i will have to do this reconnect-connect trick with cables from now on!