Thanks a lot, I installed Snow Leopard on my 6720s and used the drivers and dsdt.aml you provided and have everything working except sleep. Strangely the last aml file you provided (6720s_DSDT_Fixed.zip) results in my system lsoing mouse and it slows down a lot. I am now using the previous dsdt.aml you included in drivers pack. Did you got full display after using the latest DSDT? I have used my previous modified x3100 drivers for leopard to get full display and kexts are now showing to be loaded by the system (I am not sure if harware acceleration is working smoothly but x3100 kexts and plugins are loaded).