External Monitor, high resolution only virtual

[Roman Klinger]

Hi,

on a Dell D430 with Intel Graphic using Feisty I have a problem using an 
external monitor together with the internal one. Choosing 1024x768 or 
1280x1024 as the resolution for the external LCD, everything is fine. 
But trying to use 1600x1200, the screen is scrolling; it is only a 
virtual resolution then with a real resolution of only 1024x768. Of 
course I would like to use the real high resolution on that display.

Does someone have an idea?

In xorg.conf I configured the external monitor as follows:

Section "Monitor"
          Identifier      "External Monitor"
          Option          "DPMS"
          HorizSync       28-64
          VertRefresh     43-60
EndSection

Section "Screen"
          Identifier      "External Screen"
          Device          "Intel Corporation Mobile 945GM/GMS/940GML
Screen 1"
          Monitor         "External Monitor"
          DefaultDepth    24
          SubSection "Display"
                  Depth           1
                  Modes           "1024x768" "1280x800" "1600x1200"
          EndSubSection
          SubSection "Display"
                  Depth           4
                  Modes           "1024x768" "1280x800" "1600x1200"
          EndSubSection
          SubSection "Display"
                  Depth           8
                  Modes           "1024x768" "1280x800" "1600x1200"
          EndSubSection
          SubSection "Display"
                  Depth           15
                  Modes           "1024x768" "1280x800" "1600x1200"
          EndSubSection
          SubSection "Display"
                  Depth           16
                  Modes           "1024x768" "1280x800" "1600x1200"
          EndSubSection
          SubSection "Display"
                  Depth           24
                  Modes           "1024x768" "1280x800" "1600x1200"
          EndSubSection
EndSection

Section "ServerLayout"
          Identifier      "Default Layout"
          Screen          0 "Default Screen" 0 0
          Screen          1 "External Screen" RightOf "Default Screen"
          InputDevice     "Generic Keyboard"
          InputDevice     "stylus"        "SendCoreEvents"
          InputDevice     "cursor"        "SendCoreEvents"
          InputDevice     "eraser"        "SendCoreEvents"
          InputDevice     "Synaptics Touchpad"
EndSection


Thanks in advance
Roman Klinger