ok, so I haven't been doing the dual monitor thing lately but I needed a larger workspace over the last couple days so I hooked up my uMBP to a Samsung 2233 LCD and all was good. Then I switched over to my 9400m and nothing. I tried re-installing SL from scratch onto a new HD and even on a fresh OS install it wouldn't work. I'm currently running off the 9600m GT which I guess is fine for now but has anyone else run into this? I'm using the MDP to VGA adaptor as the DVI cable is running to the PC.