From discussion in #nouveau it seems we may need to get efifb to properly initialise the cards before nouveau loads:
10:38 <marcheu> yeah try the efifb + handoff
10:39 <marcheu> there are EFI issues
10:39 <marcheu> right now you probably want to make apple use efifb
10:40 <RAOF> Instead of nouveau?
10:40 <marcheu> use efifb+ handoff
10:40 <marcheu> to nouveau
From discussion in #nouveau it seems we may need to get efifb to properly initialise the cards before nouveau loads:
10:38 <marcheu> yeah try the efifb + handoff
10:39 <marcheu> there are EFI issues
10:39 <marcheu> right now you probably want to make apple use efifb
10:40 <RAOF> Instead of nouveau?
10:40 <marcheu> use efifb+ handoff
10:40 <marcheu> to nouveau