I recently reinstalled my AMD graphics drivers, and now the "advanced setup" button is gone from Eyefinity setup. I had Eyefinity working before I reinstalled the drivers, and the button was there, but now the button is completely gone. I can still do quick setup (before I reinstalled the drivers, quick setup brought me to a black screen that required a system restart) and it seems to work, but it automatically sets the resolution to 4480*1024 rather than 4480*1080, which is what I want (with the 56 pixels cut off from both side monitors).
My system specs:
Left: 1280*1024 monitor (DVI)
Centre: 1920*1080 monitor (DVI)
Right: 1280*1024 monitor (Plugged in with displayport, using an adapter from DVI)
Intel Core i5 2500k
Sapphire Radeon 7970 OC w/boost
16GB 1600mhz DDR3 RAM
2TB + 500TB + 500TB hard drives
Biostar TZ77XE3 motherboard
Windows System Restore to before this issue occurred would be the quickest and easiest way to regain functionality.