External WUXGA Samsung monitor is forcing my laptop to VGA resolution.

[Robert P. J. Day]

   To make a long story short, I have an aging Dell Inspiron 9200 with  
a full WUXGA (1920x1200) display happily running F7.  I hooked it via  
VGA to a WUXGA Samsung (1920x1200) monitor, hoping to see exactly the  
same content.  Instead, hooking up to the monitor forced the laptop  
back to 640x480 mode.

   If I disconnect the monitor, everything is fine and I get full  
WUXGA on the laptop.  Connect it up again, and lo-res VGA on both  
laptop and monitor.  Argh.

   I'm throwing F9 on the laptop just for fun to see if it has better  
display configuration, but is there a way around this?  How does  
connecting the monitor somehow force the laptop into 640x480 mode?   
Thanks.

rday