Ok, I disassembled the DSDT_original.aml from ubuntu ACPIDUMP with iasl, ran DSDTPatcher DSDT.dsl it created me another DSDT.aml without errrors (still a warning at compilation though), I copied it in the root of my osx boot partition, now i'm rebooting, and I don't know if everything is OK, but at least I have video working and audio.
Thanks guys