After updating the laptop to testing (including a xserver-xorg-video-openchrome update), the additional lines in Section "Monitor" are not needed anymore, i.e. this is a "lenny only" bug.
thanks, Florian -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org