I'm having a problem with resolutions as well. I have a machine setup as a hybrid. It has an Nvidia Geforce 4 mx card in it.
When using wizard-devices-media directors, I can change ONLY to two resolutions (i've tried every combination) 640x480 at 60hz and 800x600 at 60 hz. ANY other choice ends up with the test screen showing 640x480 at 60hz.
I'm ultimately trying to use a custom modeline that works well with my widescreen HDTV (Which I've used under varions linux distros in the past with excellant success)
The Modeline I would LIKE to use is:
"856x480" 37.546 856 952 1000 1112 480 513 514 563 +hsync +vsync
Setting that, or any other MODELINE manually in XF86Config-4 yields 648x480 at 60 hz.
I can't for the life of me figure out why this distro will not accept my modeline. Different Drivers perhapps?
Any help appreciated, and I would be happy to open my box up to an SSH Connection if a developer wants to take a look.