Hi, same problem here X10 XTC1300 with nvidia gives only garbage on the screen and screw console while exiting this X-mess.
But, with the latest drivers I did manage to got something else but not really good yet.
When I load the nvidia driver with "modprobe nvidia NVreg_Mobile=1 NVreg_SoftEDIDs=0" and then startx I got a readable screen with my icons inside but it is covering only the 2/3 of the DFP. By the way glx is ok and FPS are good :-). There is a large black part on the right. Switching resolution does not give anything good and messing with Scale and Dither did not too.
If I load the module with NVreg_Mobile=2 I got messy X screen like usual but return to console is good and clean.
I am using a 2.4.22rc2-ac3 kernel and the video card is the 440 Go 64M. Included my XF86Config-4
I hope it will help someone to find out this issue.