Comment 3 for bug 215876

In /usr/bin/gnome-wm lines 49 to 66 (ubuntu intrepid beta):

----
# special case handling for dapper upgrades (this runs only once after the upgrade)
if [ -z "$DEFWM" ] && [ -f /var/lib/gnome-session/dapper-upgrade ]; then
    gconftool-2 -s /desktop/gnome/applications/window_manager/default /usr/bin/metacity --type string
    DEFWM=/usr/bin/metacity
fi

# If not exist, set to compiz (if available)
if [ ! -x "$DEFWM" ]; then
    if [ -x "/usr/bin/compiz" ]; then
 gconftool-2 -s /desktop/gnome/applications/window_manager/default /usr/bin/compiz --type string
 DEFWM=/usr/bin/compiz
    elif [ -x "/usr/bin/metacity" ]; then
 gconftool-2 -s /desktop/gnome/applications/window_manager/default /usr/bin/metacity --type string
 DEFWM=/usr/bin/metacity
    else
 unset DEFWM
    fi
fi
----

To my mind, the special case handling for dapper upgrade should be removed (impossible to upgrade directly from dapper to intrepid). But doesn't matter.

The important thing is to call "nvidia-settings -l" :

----
# If not exist, set to compiz (if available)
if [ ! -x "$DEFWM" ]; then
    if [ -x "/usr/bin/compiz" ]; then
 gconftool-2 -s /desktop/gnome/applications/window_manager/default /usr/bin/compiz --type string
 DEFWM=/usr/bin/compiz
 if [ -x "/usr/bin/nvidia-settings" ]; then
  /usr/bin/nvidia-settings -l
 fi
    elif [ -x "/usr/bin/metacity" ]; then
 gconftool-2 -s /desktop/gnome/applications/window_manager/default /usr/bin/metacity --type string
 DEFWM=/usr/bin/metacity
    else
 unset DEFWM
    fi
fi
----

Maybe nvidia-settings -l should be called in another place, please tell me if you find a better place.

This fix is important, because users don't understand why compiz has a such bad quality, while they configure vsync and/or anisotropic and/or antialiasing in nvidia-settings.