[TPG]

Please resinstall X server by loging as a root and typing:

urpmi x11-server-common

nvidia 1.0-87XX drivers are a bit old. Try to use newer ones, but in Mandriva case drivers prepared by PLF(penguin liberation front).

I don't really think this is related to nvidia, please post your problem on Mandriva's corresponding forums or on #mandirva channel on freenode.