Earlier today I downloaded updated nVidia Vista video drivers for my GeForce 8600M GT on my laptop with Windows Update and promptly dual monitor support started failing again. Single monitor works fine but the second monitor will simply not kick in with the new driver.
I ended up having to roll back to the last restore point before the update and I'm now back to a working video setup which has been working fine for the last few months using driver release 101.43 - the original driver that was shipped from Dell., But boy is it discouraging to see this problem return once again with a driver update especially one that's coming down through Windows Update. I thought that I was over the video nightmares that I was having with my pre-Vista machine and the GeForce 7800 Go, which also couldn't deal with multi-monitors properly. Same symptoms: Long time to sync the video card to even the primary monitor and several crashes while trying to get there. Then the second monitor would flicker on and off cycling through various video modes before giving up.
I suppose I can just stick with the driver that (mostly) works, but there are a few issues with this driver as well, mainly that on occasion after going to sleep it will loose its configuration and bring the two monitors back at incorrect resolution. It's rare but I'd still like to see that fixed which is why I opted to install the driver in the first place.
Anybody have any better luck with more recent drivers from nVidia with 8600M GT? I'm pretty wary after this excercise to install new video drivers <s>...