Well, I have been able to solve the problem and I am able to use nvidia driver again. The problem is that nvidia-prime blacklist nvidia driver. The file is "/etc/modprobe.d/blacklist-nvidia.conf" with content: # Do not modify # This file was generated by nvidia-prime blacklist nvidia blacklist nvidia-drm blacklist nvidia-modeset alias nvidia off alias nvidia-drm off alias nvidia-modeset off
File was never re-established, even when uninstalling/purging nvidia- prime package. I think that this file should be re-established/deleted when you uninstall nvidia-prime. Thanks Alberto and other maintainers for your hard work maintaining nvidia packages ( -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1757180 Title: nvidia-prime can't switch off the discrete GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1757180/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs