I should've been clearer -- I made those changes through dpkg-reconfigure. (I've grown
quite comfortable with the menu interface to Xorg.conf in the last 24 hours!)
And, BTW, you're using etch, right?
Correct.
lspci shows one VGA-compatible device, the line is:
01:00.0 VGA compatible controller: nVidia Corporation Unknown device 0402 (rev a1)
I should've looked harder at the Xorg.0.log I got when I ran with the VGA drivers; it told
me directly that the VGA driver does not support 24-bit color depth, so it unloaded
itself. I set this back down to 8-bit color, and just like that I can load up a minimal
gnome desktop.
Sadly it has decided the correct resolution is 320x200, which is not yet very useful --
I can't even see to reposition any of the control panels -- when I was hoping once I
got a minimal setup I could use that as a base to finish configuring the nVidia-supplied
drivers. But at least this is wonderful progress! Thank you!