Searching nvidia.com for that GPU seems to recommend installing driver '430.50'. So please try:
sudo apt install nvidia-driver-430 At present that will give you 430.26 but version 430.50 is in bionic- proposed so will come in a future update for Ubuntu 18.04, soonish. ** Summary changed: - X won't start at boot with either nvidia driver + X won't start at boot with either nvidia driver on GeForce GT 730 (bionic) ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Also affects: nvidia-graphics-drivers-390 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1846899 Title: X won't start at boot with either nvidia driver on GeForce GT 730 (bionic) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1846899/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp