Comment 1 for bug 1778011

Here is a PPA with the current code for Bionic, available for testing:
https://launchpad.net/~albertomilone/+archive/ubuntu/hybridgraphics?field.series_filter=bionic

You will have to upgrade systemd, nvidia-prime, and ubuntu-drivers-common, call "sudo update-initramfs -u" (just in case), and reboot