I had the same problem with a similar NVIDIA GeForce video card. XFree86 failed with the "(EE) Screen(s) found, but none have a usable configuration." log message.
The problem seemed to be frame buffering. Try setting UseFBDev to false in /etc/X11/XF86Config-4. That worked in my case. I hope it does in yours as well. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
