Thank you for your reply.
I attach the xorg.conf file
Valery
# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc
Dear colleagues,
we have problems to configure X-server manually on Debian-squeeze.
Starting the xserver without a manually placed /etx/X11/xorg.conf the system
works fine but the screen resolution cannot be put to maximum values within
a the running x-session (gdm3). The video card seems to be i
