I was able to stop the loop by blacklisting the nvidia modules and restarting the system. I added /etc/modprobe.d/nvidia-kill.conf, deliberately chose to appear after the existing nvivida conf files in the same directory (not sure if that's essential):
blacklist nvidia_367 blacklist nvidia_367_uvm blacklist nvidia_367_modeset blacklist nvidia_367_drm alias nvidia off alias nvidia-uvm off alias nvidia-modeset off alias nvidia-drm off This was all guesswork; I don't know how much is essential. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1655584 Title: systemd-udevd busyloops when nvidia kernel module fails to load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1655584/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs