I got the infamous (for being crap) R4i Deluxe that unlike the R4 deluxe, can't use YSmenu, not even as dual boot.
Is this because this one is a Acekard clone instead of a R4 clone?
So I tried a lot of alternate firmwares and the best result was with AKAIO.
280797-AKAIO 1.8.6a.R4U boots but...