I have an ASUS Maximus V Extreme motherboard which has onboard video. There is an Asus GeForce GTX 670 in PCIe slot 1.
In the BIOS, I have
PCIe selected as the preferred GPU. I've tried disabling Fast Boot and other items to attempt to get the PCIe display to work during POST. I've also updated the BIOS to the latest version available on ASUS' support site.
With the HDMI display plugged into the onboard video, I can see the POST and everything is fine. With the HDMI display plugged into the PCIe GPU, I have a blank screen until the point in which Windows starts to initialize and then everything is fine.
Is there a setting somewhere that I'm missing?
The problem is, I dual boot to Ubuntu and I'm forced to manually switch the HDMI cable to select things during POST or to enter BIOS. Not very convenient.
Any help would be greatly appreciated.