GTX 1080Ti Graphics Driver on ubuntu problem

Hi, I know there are alot of guides already and i have tried different keyword search and tried(almost) all of the variations approach but with no luck, drivers are found in /proc/driver/… but nvidia settings still gives error “try sudo nvidia-xconfig & restart xserver” <- means it is not activated right (?) HELP! PLEASEEE

Edit : UEFI Secure Boot is not disabled, because Ubuntu is not even booting after disabling Secure boot
Ubuntu 14.04 is used here

How did you install the driver?
Please run and attach output file to yor post.