I did check the /var/log/messages last night and I couldn't see to much. It tells me that NVIDIA driver was loaded with warnings and then it mentions about "agpgart" version ... and that's it. It doesn't tell me if agpgart was successfully loaded or not. But if I take a look again at /proc/driver/nvidia/agp/status I see the same thing " Status: disabled" .
Also, I've tried last night to use option "NvAGP "1" ... but the result is the same and in /var/log/messages , all I can see is that NVIDIA driver was loaded with warnings.
The BIOS has enabled AGP 4x.
Where could be the problem ?