Hi , i have a similar problem with my 8600GT and Linux drivers
I have done a clean install of Ubuntu 7.10 , used the restricted drivers manager to install the restricted Nvidia drivers, but when i try and use them i get no display , regardless of using DVI or Analog cables.
My 8600GT has 2x DVI ports on it.
Biostar NF4 Chipset MB Socket 939
"generic" 1280x1024 LCD panel
Note : everything works fine in XP ( i hate dual booting )
I have attached two log files generated by the nvidia-bug-report.sh script
one when using the Nvidia Restricted driver, and the other using the generic "nv" driver that comes with Ubuntu by default.
I have also posted other info in this thread on the Ubuntu Bugs page
it has output from lspci -vvv, xorg.log files, xorg.conf files , output from the "screens and graphics" applet after trying to test the Nvidia driver and having it fail.