I'm also seeing the same issue following a recent update. In my case, it's with the Intel embedded graphics controller on an ASUS P8Z68-V Pro/Gen3 motherboard. Originally it worked fine, then after a recent update, the Display section of system settings only sees one monitor, even though both are presenting identical content. The primary monitor is attached to the VGA port, the secondary is attached to the DVI port. I'm running FC16 x86_64. Any help would be greatly appreciated.
---------- Post added at 10:42 PM ---------- Previous post was at 10:10 PM ----------
Additional notes: I just picked up an update this evening, which included the following components:
Made no difference at all. Still seeing only one monitor listed in the Display section of system settings, and both monitors are presenting identical content.