hi, the vaio support has released a new driver for nvidia graphic card of vaio z11. See that:
But the driver is for xp and not for vista and the installation of it bring to the complete no use of the switch between intel and nvidia. I'd a bad week end for it (but very thanks at testdisk and ubuntu
Someone else has found the same problems? Because if there's this problem, it is a very big mystake of sony...