no OpenGL

I have run this computer for a few years with OpenGL and the nvidia drivers 
without problem.

Suddenly, I am told that there is no OpenGL!

How do I get it? I have mesa-libGL and mesa-libGLU and other stuff installed.

In xorg.conf:

Section "Device"
	Identifier  "Videocard0"
	Driver      "nvidia"
	VendorName  "eVGA"
	BoardName   "nVidia Corporation NV43 [GeForce 6600/GeForce 6600 GT]"
	Option	    "NoLogo" "true"
	Option	    "DPI" "96 x 96"
	Option      "AllowDDCCI" "true"
	Option      "TripleBuffer" "true"
	Option      "AddARGBGLXVisuals" "true"
	Option	    "DisableGLXRootClipping" "True"
	BusID       "PCI:1:0:0"
EndSection

Curiously, the last 4 Options don't get loaded, but there never was a problem 
before f8.

What gives?