I can't get my second display to rotate into a portrait view.

I've added a second "Monitor", "Device", and "Screen" Section to
XF86Config-4.
A second desktop *does* show on the second monitor.

Adding Option "Rotate" "on" or Option "Rotate" "CW" doesn't work.
Disabling "RandR" doesn't work either.
It's been mentioned in the forums that using the 'nv' driver could work
instead.

Has anyone done it successfully with an nVidia geforce fx 5200 card or
something similar?
I only want to use a second, rotated display. Any method that you know
if would be appreciated.

/etc/X11/XF86Config-4:

Section "Device"
Identifier "videocard0"
Driver "nvidia"
BusID "PCI:1:0:0"
Screen 0
Option "RenderAccel" "true"
Option "NvAGP" "1"
# Option "AGPMode" "4"
EndSection

Section "Device"
Identifier "videocard1"
Driver "nvidia"
Screen 1
BusID "PCI:1:0:0"
Option "RenderAccel" "true"
Option "NvAGP" "1"
Option "Rotate" "CW"
# Option "AGPMode" "4"
EndSection


Section "Monitor"
Identifier "monitor0"
HorizSync 30-81
VertRefresh 56-85
Option "DPMS" # display power management signaling
EndSection

Section "Monitor"
Identifier "monitor1"
VendorName "Compaq"
ModelName "Compaq 1520"
HorizSync 30-81
VertRefresh 56-85
Option "DPMS" # display power management signaling
EndSection

Section "Screen"
Identifier "screen0"
Device "videocard0"
Monitor "monitor0"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "screen1"
Device "videocard1"
Monitor "monitor1"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 4
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 15
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection


Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "screen0"
Screen 1 "screen1" LeftOf "screen0"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "ServerFlags"
Option "RandR" "0" # to enable rotation
EndSection

Section "DRI"
Mode 0666
EndSection