Seems the kernel driver failed to build/install. Please run:
sudo apt install --reinstall nvidia-driver-515 nvidia-dkms-515 and then reboot. ** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-515 (Ubuntu) -- 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/2016426 Title: After doing updates, can not boot up to the desktop GUI (KDE). GPU: Nvidia To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-515/+bug/2016426/+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
