Recent versions of gnome – at least the one shipped with Ubuntu 9.10 and 10.04 – use resolution settings specific for each user. The resolution is set in /home/username/.config/monitors.xml which is loaded upon login.
The tool provided along with NVIDIA driver changes your resolution in /etc/X11/xorg.conf but not in monitors.xml as gnome’s “Monitors” tool does. As a consequence you need to edit /home/username/.config/monitors.xml manually:
<monitors version="1"> <configuration> <clone>no</clone> <output name="default"> <vendor>???</vendor> <product>0x0000</product> <serial>0x00000000</serial> <width>1920</width> <height>1080</height> <rate>0</rate> <x>0</x> <y>0</y> <rotation>normal</rotation> <reflect_x>no</reflect_x> <reflect_y>no</reflect_y> <primary>no</primary> </output> </configuration> </monitors>
