dell inspiron n5110 i have problem with my nvidia card

view full story

http://askubuntu.com – sorry i syrian and my English not very well so this is my problem i have downloaded the driver form nvidia site and then i pressed ctrl+alt+f1 login:root pass:root i opened the file that i downloaded it and do an install for it then it asked me to do run for nvidia-xconfig and i accept that i have reboot after that i found the resolution is 640*480 and it can't be change i opened the nvidia setting server .. it send a message about i didn't run "nvidia-xconfig" but i did this so if anyone can please tell step by step how to install nvidia driver and i will be thankful laptop information: c (HowTos)