I'm having some trouble getting my LG 1920x1080 monitor working

under OpenBSD 4.5. The relevant sections of my xorg.conf are as

 follows:
...

Section "Monitor"

        #DisplaySize      510   290     # mm

        Identifier   "Monitor0"

        VendorName   "GSM"

        ModelName    "W2361"

        HorizSync    30.0 - 83.0

        VertRefresh  56.0 - 75.0

        Option      "DPMS"

EndSection
Section "Device"

        ### Available Driver options are:-

        ### Values: : integer, : float, : "True"/"False",

        ### : "String", : " Hz/kHz/MHz"

        ### [arg]: arg optional

        #Option     "SWcursor"                  # []

        Option     "HWcursor"                   "False"

        #Option     "NoAccel"                   # []

        #Option     "ShadowFB"                  # []

        #Option     "UseFBDev"                  # []

        #Option     "Rotate"                    # []

        #Option     "VideoKey"                   # 

        Option     "FlatPanel"                 "True"

        #Option     "FPDither"                  # []

        Option     "CrtcNumber"                 "1"

        #Option     "FPScale"                   # []

        #Option     "FPTweak"                   # 

        #Option     "DualHead"                  # []

        Identifier  "Card0"

        Driver      "nv"

        VendorName  "NVIDIA"

        BoardName   "GeForce 7400 Go"

        BusID       "PCI:1:0:0"

EndSection

...

Section "Screen"

...

        SubSection "Display"

                Viewport   0 0

                Depth     24

                Modes   "1920x1080"

        EndSubSection

EndSection
When I try to start X via xinit, it dies with:
...

(--) NV(0): CRTC 0 is currently programmed for DFP

(**) NV(0): Forcing CRTCNumber 1 as specified

(II) NV(0): Using DFP on CRTC 1

(--) NV(0): Panel size is 1 x 1

(II) NV(0): NOTE: This driver cannot reconfigure the BIOS-programmed size.

(II) NV(0): These dimensions will be used as the panel size for mode validation.

(II) NV(0): Panel is LVDS

(--) NV(0): VideoRAM: 131072 kBytes

(==) NV(0): Using gamma correction (1.0, 1.0, 1.0)

(II) NV(0): Monitor0: Using hsync range of 30.00-83.00 kHz

(II) NV(0): Monitor0: Using vrefresh range of 56.00-75.00 Hz

(II) NV(0): Clock range:  12.00 to 400.00 MHz

(II) NV(0): Not using default mode "640x350" (exceeds panel dimensions)

(II) NV(0): Not using default mode "320x175" (bad mode

clock/interlace/doublescan)

(II) NV(0): Not using default mode "640x400" (exceeds panel dimensions)

(II) NV(0): Not using default mode "320x200" (bad mode

clock/interlace/doublescan)

(II) NV(0): Not using default mode "720x400" (exceeds panel dimensions)

(II) NV(0): Not using default mode "360x200" (bad mode

clock/interlace/doublescan)

(II) NV(0): Not using default mode "640x480" (exceeds panel dimensions)

...
The problem seems to be that the panel size is detected as a 1x1 instead

of a 1920x1080. Why is this happening and what must be done to fix it?

(the nv(4) manpage offered no insight).
Thanks,

Sturm Mabie