> For now, you'll have to upgrade to xf86-video-nv-2.1.9 and try using the AllowDualLinkModes option.
Nice hint, Aaron. It worked!!
For other's out there...here's what I did:
The current FreeBSD port is at xf86-video-nv-2.1.8. You'll need xf86-video-nv-2.1.9 to get this to work. There are no patches to the port so its a simple matter of downloading it and compiling it. I changed the version numbers in the files in usr/ports/x11-drivers/xf86-video-nv, filled the work directory with the extracted source from http://xorg.freedesktop.org/releases/individual/driver/xf86-video-nv-2.1.9.tar.bz2, fiddled with some file modes to make appropriate files executable, and then did "make install". This gets you a nvidia driver that works with FreeBSD-amd64.
/etc/X11/xorg.conf can be constructed as per the FreeBSD handbook; here are the critical sections:
Section "Monitor"
Identifier "Monitor0"
VendorName "HP"
ModelName "LP3065"
DisplaySize 641 400
HorizSync 100.0
VertRefresh 60.0
ModeLine "2560x1600" 268.00 2560 2608 2640 2720 1600 1603 1609 1646 +hsync -vsync
Option "DPMS"
EndSection
Section "Device"
Option "AllowDualLinkModes" "True"
Identifier "Card0"
Driver "nv"
VendorName "nVidia Corporation"
BoardName "GeForce 8500 GT"
BusID "PCI:2:0:0"
EndSection
Once again, thanks to Aaron...I was starting to debug the driver and this wasn't fun.
Rawld