The new vga arbiter API in Fedora 12's kernel breaks the nVidia driver
when used with multiple cards. Drivers that don't need legacy VGA I/O
are supposed to opt-out of VGA Arbitration.
I posted a patch to nvnews last night that is working for a few people
(including myself) for multi-card configurations.
http://www.nvnews.net/vbulletin/showthread.php?t=142656
Can the nvidia driver maintainer incorporate the patch in the rpmfusion
package? The patch is attached.