Hello flip360. I have a notebook AsusK70IO which have similar hardware to AsusK50IN. Now I'm having problems upgrading to 10.7.2 and 10.8. Currently my graphic card (NvidiaGT120M) works perfectly under 10.7 (maximum 10.7.1). When I upgrade it to 10.7.2 or higher (10.8 as well), the system fails to find output port for my graphic card. So there's no video output signal for my display and my VGA port as well. But with screen sharing, I can still see my desktop on a remote device. Someone say it's because my DSDT. Would you please help me with it?
Besides, my audio chip (Alc662) works only before 10.6.2. I tried many kexts, but none of them works. What was worse, a newer version AppleHDA.kext would cause my graphic card unrecognized (1024x768 only, and QE/CI fails).

Thank you for your reply.