Configure monitor rotation with nVidia.

[Dave Woyciesjes]

Ubuntu 9.10 nVidia GeForce 7600 GT.
2 Dell 1907FPv monitors
Using v185 of the nVidia driver, that came through the Hardware driver 
applet.
I've got it set for TwinView, using nVidia-settings control panel.
DFP-1 - monitor on left
DFP-0 - monitor on right
	I wanted to try and rotate DFP-0, and leave DFP-1 at landscape. 
nVidia-settings didn't seem to have anything about rotation, so I loaded 
up the grandr (Multiple Screens) GUI. That only sees one 2560x1024 
monitor, and the rotation option is greyed out.
	Searching around got me to here:
http://ubuntuforums.org/archive/index.php/t-1335433.html
Looking at the post from Nick Payne (11/29/2009), I added:

Option "RandRRotation" "on"
Option "Rotate" "CCW"
...to the one & only Monitor section in my xorg.conf file. Which worked, 
just not the way I anticipated. Instead of going to the side to get to 
the other monitor, I had to go to the top of DFP-0, when was "connected" 
to the bottom of DFP-1. Which was correct when the monitors were 
physically oriented landscape.
	Workaround is to go into nvidia-settings, and change the layout to 
DFP-1 on top, and DFP-0 on bottom. Works, but not logically correct.

	Now for the questions:
	Would changing from TwinView to Separate X screens in nvidia-settings 
allow me to rotate one, and not the other; and would the layout preview 
in nvidia-settings be logically correct?
	I'm guessing using separate X screens would give me 2 monitor sections 
in xorg.conf, so I can rotate individually. Right?
	I saw a gripe about using Separate X screens. Would I still be able to 
drag windows back & forth between monitors?
	I'm assuming Compiz would still work. The cube, painting fire on screen 
and other toys are good for impressing folks here..
	Currently, with TwinView, I can't maximize or resize FireFox & other 
app windows to use both screens. Would separate X screens fix this 
annoyance?

	I would just try switching, but since this is my production box at 
work, I need to minimize down-time....

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--- Dave Woyciesjes
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