I have a wonderful HP LP2475W monitor with a pivoting standard:
I wondered if it was easy to use the portrait mode under Linux.
When using proprietary nvidia drivers it is no problem at all:
1. Add the following line to the Device-section for the graphics-card (in /etc/X11/xorg.conf):
Option "RandRRotation" "on"
2. Use these two commands:
xrandr -o 1 Rotate to portrait
xrandr -o 0 Rotate to landscape
3. Add this to rc.xml keybindings to use Openbox keybindings Super + Left (W+ Left) for Portrait and Super + Right back to Landscape Mode
xterm -e "xrandr -o 0" Screen in Portait Mode
xterm -e "xrandr -o 1" Screen in Landscape Mode
Thanks to this article: http://symlink.dk/linux/config/pivot/