dual monitor config problem

[Paul Kaplan]

I'm running X 7.1 on kubuntu edgy on a Thinkpad/Intel i915 using the i810 
drivr with mergedfb to enable a dual monitor setup.  There's a 1024x768 LCD 
on the Thinkpad and a 1280x1024 external LCD.  I have two ServerLayout 
sections so that I can use a single virtual desktop when the external LCD is 
attached but not when it isn't.

Right now the default is to use the dual monitor setup.  As a result, if the 
external monitor isn't present the virtual desktop still exists, but is 
displayed in empty space.  I have to do a console login and manually startx 
calling to the single monitor SeverLayout stanza.  On a previous box, I was 
using Xinerama and it did auto detection, calling the correct stanza for the 
hardware setup.  Even using xrandr would be more convenient than consoling.

How do I rectify?  Is it possible with mergedfb on xorg 7.1  What about 7.2?  
Is there a better driver than the one kubuntu is providing?
Paul