DIOS-MIOS normally sets up the video mode, that should not be modified, GX completely disables that, so DIOS-MIOS got no control at all about the video mode, that should not be used, in older versions that also made big problems. Currently it looks like for some strange reason that DIOS-MIOS fails miserably setting up the video mode by itself, idk why. So its just luck that it currently works, in the next release it can be it doesnt work at all.without looking into the code.
What is he doing and why is it wrong?
It seems that it fixes some compatibility issues.