X11 Configuration for Captiva E1903W monitor on Ubuntu

One of the employees of materialboerse.de GmbH got a new LCD monitor yesterday. Graphical interface (X11) stopped working. I tried to reconfigure the xserver with dpkg-reconfigure xserver-xorg, but that didn't help. Finally I edited the frequencies and modes manually in /etc/X11/xorg.conf with the values from the monitor's manual and now everything works fine.

Section "Monitor"

Identifier "MNT-ANALOG19"

Option "DPMS"

Horizsync 30-80

Vertrefresh 60-80

EndSection

Section "Screen"

Identifier "Default Screen"

Device "nVidia Corporation C51G [GeForce 6100]"

Monitor "MNT-ANALOG19"

Defaultdepth 24

SubSection "Display"

Modes "1440x900" "1280x1024" "1024x768" "800x600" "640x480"

EndSubSection

EndSection