I have an HP omen laptop with the intel and 1050 hybrid, same issue.
The fix is to disable the nouveau driver:
Code:
sudo bash -c "echo blacklist nouveau > /etc/modprobe.d/blacklist-nouveau.conf"
sudo bash -c "echo options nouveau modeset=0 >> /etc/modprobe.d/blacklist-nouveau.conf"
sudo update-initramfs -u
Edit: you can also disable it through your grub with nouveau.modeset=0
Code:
https://askubuntu.com/questions/747314/is-nomodeset-still-required
(I have not personally tested this btw)
Note: I have managed to get optimus working with the 390 drivers too but am doing a few tests with the 396 drivers before I post a guide on how to do this.
(DO NOT SETUP xorg through the nvidia installer, it breaks with the hybrid multi adapter setup)