It looks like you have the nvidia kernel driver version 415 installed but no Xorg driver to match. That may be the problem.
Another problem is that the Nvidia driver version 415 is not part of Ubuntu (where did you get it from?), so this is not a valid Ubuntu bug. Please remove the driver and/or install a supported version like: sudo apt install nvidia-driver-390 ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Invalid -- 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/1816483 Title: problem with nvidia driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1816483/+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