Linux & G500/poulsbo

Dell Mini 10 is a Linux-nightmare, but this page is quite helpful:
http://wiki.ubuntuusers.de/Grafikkarten/Intel

And Modeline needs to be added:
http://julipedia.blogspot.com/2007/03/x11-mode-line-generator.html

This is also useful:
http://www.fit-pc2.com/forum/viewtopic.php?f=9&t=768

Finally I modified /etc/X11/corg.conf the following way, to run stable and support my external screen with 1400x900 resolution:

Section "Monitor"

    Identifier "Configured Monitor"

    Modeline "1440x900_60.00" 106.47 1440 1520 1672 1904 900 901 904 932 -HSync +Vsync

EndSection

Section "Screen"

    Identifier "Default Screen"

    Monitor "Configured Monitor"

    Device "Configured Video Device"

    SubSection "Display"

        Virtual 2464 900

    EndSubSection

EndSection

Section "Device"

    Identifier "Configured Video Device"

    Option "AccelMethod" "EXA"

    Option "DRI" "off"

    Option "MigrationHeuristic" "greedy"

EndSection