When I try to use the Display Settings manager it does not list any resolutions. The box next to the gamma correction sliders is empty. Is there a trick to getting them to appear?
I have quite a few valid modelines in my xorg.conf file. I have Xrandr 1.0.2 installed.
I have the latest xfce from cvs, it was built maybe two weeks ago.
You may be better off without them. In response to your post, I started checking out that settings module. As soon as I selected one of the options, Xfce crashed and I found myself at the login screen.