Ubuntu keeps multiple kernel versions installed as a safety fallback. And also each DKMS driver like nvidia should get rebuilt for each kernel that's installed. Although sometimes that step fails, which might explain this bug...
Please reproduce the issue again so we can get a system log of it. Then reboot and run: journalctl -b-1 > prevboot.txt and attach the resulting text file here. ** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-525 (Ubuntu) ** Changed in: nvidia-graphics-drivers-525 (Ubuntu) Status: New => Incomplete -- 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/2020660 Title: Xorg freeze after selecting Nvidia driver v525 (instead of v515) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-525/+bug/2020660/+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