HOWTO vertical display (X, Nvidia)

Here is how to get your monitor looking something like this (not my monitor, btw):




























Put this line as an option in the "Device" section of /etc/X11/xorg.conf: Option "Rotate" "CCW" Then, restart X with Ctrl+Alt+Backspace. Afterwards, start up sudo nvidia-settings and shuffle the screens around in X Server Display Configuration so that they are properly aligned. Be sure to press the Save to X Configuration File button.

Found via this forum thread and a tip from Arash.

Update:
Following is an xorg.conf file to get 2 Dell 2407 monitors in a T formation (with one on the left vertical and one on the right horizontal aka Rajiv-style). This setup has a few problems, though...
1) The screens are flush at the top, which makes a window across both monitors look disjointed... not a huge problem, and could probably be solved by tweaking the config
2) Can't seem to get compiz-fusion to work
3) Using Xinerama instead of Twinview is waaaaay slower, especially when an object is on both screens
4) Just feels too unnatural... I'm going back to both screens horizontal
It's also a bit hard finding helpful forum posts on these things anyways because everyone seems to misuse the terminlogy (Xinerama, Twinview, etc.) and problems are very individual (Depending on video drivers, screens, etc.). Anyways, here's the xorg.conf:

Section "ServerLayout"
   Identifier     "Default Layout"
   Screen      0  "Screen0" RightOf "Screen1"
   Screen      1  "Screen1" 0 0
EndSection

Section "Module"
   Load           "glx"
EndSection

Section "ServerFlags"
   Option         "Xinerama" "1"
EndSection

Section "InputDevice"
   Identifier     "Generic Keyboard"
   Driver         "kbd"
   Option         "XkbRules" "xorg"
   Option         "XkbModel" "pc105"
   Option         "XkbLayout" "us"
EndSection

Section "InputDevice"
   Identifier     "Configured Mouse"
   Driver         "mouse"
   Option         "CorePointer"
EndSection

Section "Monitor"
   Identifier     "Configured Monitor"
EndSection

Section "Monitor"
   Identifier     "Monitor0"
   VendorName     "Unknown"
   ModelName      "DELL 2407WFP"
   HorizSync       30.0 - 83.0
   VertRefresh     56.0 - 76.0
EndSection

Section "Monitor"
   Identifier     "Monitor1"
   VendorName     "Unknown"
   ModelName      "DELL 2407WFP"
   HorizSync       30.0 - 83.0
   VertRefresh     56.0 - 76.0
EndSection

Section "Device"
   Identifier     "Videocard0"
   Driver         "nvidia"
   VendorName     "NVIDIA Corporation"
   BoardName      "GeForce 7900 GS"
   Option         "Rotate" "CCW"
   Option         "NoLogo" "True"
   BusID          "PCI:1:0:0"
   Screen          0
EndSection

Section "Device"
   Identifier     "Videocard1"
   Driver         "nvidia"
   VendorName     "NVIDIA Corporation"
   BoardName      "GeForce 7900 GS"
   BusID          "PCI:1:0:0"
   Screen          1
EndSection

Section "Screen"
   Identifier     "Screen0"
   Device         "Videocard1"
   Monitor        "Monitor0"
   DefaultDepth    24
   Option         "TwinView" "0"
   Option         "metamodes" "DFP-0: nvidia-auto-select +0+0"
EndSection

Section "Screen"
   Identifier     "Screen1"
   Device         "Videocard0"
   Monitor        "Monitor1"
   DefaultDepth    24
   Option         "TwinView" "0"
   Option         "metamodes" "DFP-1: nvidia-auto-select +0+0"
EndSection