hmm, i might be missing something, but is it a ATI type card?
anyways, you can use the default drivers for it from the xfree/xorg package drivers, they are sometimes better then the proprietary drivers also
anyways, the "correct" drivers are only important if you want direct rendering (needed to play 3d games at a descent speed, or with medium to high quality) ...... the command
glxinfo |grep direct
should tell you if it is on for not, this needed to be on direct rendering if you have a 3d card, it will speed up things a lot
|