Have you tried something like video=controlfb:1024x768@75 ? If not, you can try the old style Mac Modes support with video=controlfb:vmode:15 (Try different values, 15 is 1024x768 at 70Hz, 14 at 60Hz etc... the full list is in drivers/video/macmodes.h) It should have picked up the default from your nvram but maybe that didn't work for some reason... Ben.