nigno21

Hi to all,
I'd tried to install mountain lion on my dell studio xps1340...
Previous I had installed Lion 10.7.4 and was all ok, but installing ML2, first the system block in a black screen...
Deactivating NVidia Enabler the ML2 start correctly but the graphics is very slow and the system don't
recognize correctly my two video cards 9400M+9200GS.
I install after system installation the NVidia Kext and the system recognize correctly the video cards like in Lion 10.7.4,
but the graphics in very slow and If I try to launch a simple game like angry birds it says that I didn't load any openGL or similar...

How can I enable my video cards?
Please help...

System detail:
Processore: Intel® Core™2 Duo CPU P9600 @ 2.66GHz
Proprietà della scheda madre
Nome scheda madre Dell Studio XPS 1340
Memoria 2x4GB DDR3-1066
Tipo chipset GeForce 9500M (GF 9400MG + GF 9200MGS) 256MB