I have three ASUS 23" monitors, hooked up in an Eyefinity setup on an XFX Double D HD 7870.
My left monitor is plugged into the lower DVI, my middle monitor in the upper DVI, and my right monitor into the left miniDP via an active miniDP->DVI adapter.
However, when booting my PC, my left and right monitors show the POST screen and the Windows 7 boot screen, but only the left shows the logon screen, and the middle doesn't show anything at all until I have logged on. I have two profiles set up through CCC, one with three separate desktops set to extend, each one at 1920x1080, and one with them as a single 5760x1080 DisplayGroup. I usually leave it in extend mode unless I'm gaming, and then I switch it to Eyefinity via a hotkey. If I reboot while having it set in Eyefinity, it will show the POST/boot screen on the same monitors as before, but the logon screen on the middle monitor, with some overhang. It looks like it may be about 2160x1080 or so. I can furbish screenshots/pictures if it would be easier to tell what I mean.
Can anyone explain why my middle monitor doesn't even turn on until I login to windows? And on a side note, has anyone had any luck getting the logon screen to span across an Eyefinity setup?