Question about dual monitors

[Daniel Carrera]

Hey,

Here's a snip from my X.org config file:

Section "Monitor"
         Identifier      "Generic Monitor"
         Option          "DPMS"
         HorizSync       28-49
         VertRefresh     43-72
EndSection

Section "Monitor"
         Identifier      "External Monitor"
         Option          "DPMS"
         HorizSync       28-49
         VertRefresh     43-72
EndSection


How is X.org or Xinerama supposed to know which one is supposed to be 
the LCD screen on my laptop and which one is the CRT connected to the 
VGA output?

There is nothing that I can see in the X config file that could tell X 
or Xinerama which is which. The identifier is just a human-readable 
string, it could just as well be "WALA WALA".

If X can't possibly distinguish between these, it's not surprising that 
it's not doing what I want. I expect that X is just ignoring "Screen 1" 
entirely because it doesn't know what to do with it.

Help?

Cheers,
Daniel.
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