I have a mobo with integrated ATI Radeon HD 4200 setup as primary adapter. I have PCI-E NVIDIA GeForce GT 430 as a second adapter. Server 2008 using Win7 x64 drivers where necessary.
I'm using the VGA outputs on both cards to feed to a KVM. My goal is to mirror the monitors so I have only one desktop, but the integrated video adapter stays live. Without a monitor attached, the graphics chip goes dead, and one of my number crunchers goes dead (BOINC, Collatz-ATI).
If the KVM cables are hooked up to the same card, I can mirror the monitors. When I have on on the ATI + one on the NVIDIA, my only options are:
Extend these displays
Show desktop only on 1
Show desktop only on 2
Am I asking the impossible here? Will the OS not mirror because the two cards are different? Doesn't make sense. I've even set the resolution, depth, and frequency identically on both cards. Installed the same monitor driver for both.
Any help is appreciated.