Not good. The first time I had screen lock when I pushed the "test" button. After that, I got through "test" and had screen lock when I pushed "save." What actually works, temporarily, was to copy xorg.conf.install over xorg.conf. I'm not totally sure about the resolution; I doubt its as high as the card should go. All my attempts to get into sax2 from gui yast, console yast, and by typing sax2 dump me back into 640X320 without the entry screen that shows resolution and 3d status. It's been a while since I dove into one of these (back then, XF86) files, but I'm going to start adding things to the install file from my last sax generated file and see what breaks it.
Sounds like gdm/kdm/xdm is setting your video card into a mode that it cannot recover from when dropping to text mode. Have you gone to runlevel 3 and ran 'sax2' to properly set your video parameters?
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