When switching prime profiles to Intel & using kms for nvidia the ubuntu session is not available

[Doug McMahon]

Extended test case:
Prerequisites: A laptop with nvidia hybrid gpu
               Latest repo nvidia drivers installed (384
               Prime sync not yet enabled

While on the nvidia driver profile boot up, login screen should only offer the xorg session.
In nvidia-settings switch to Intel, restart (one must *always restart with gdm3*
What happens:
At log in both the wayland & xorg session options are present (correct behavior

Switch back to nvidia in nvidia-settings
Enable prime sync (how below
Restart
What happens:
At login only the xorg session is presented (correct behavior

Now again open nvidia-settings, switch to Intel
Restart
What happens:
At log in only the xorg session is present (incorrect behavior
What should happen:
Both the wayland & xorg sessions should be present

To enable prime sync:

sudo nano /etc/modprobe.d/zz-nvidia-modeset.conf

Insert this line, save:
options nvidia_384_drm modeset=1

Run
sudo update-initramfs -u

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-session (not installed)
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 8 09:29:25 2017
InstallationDate: Installed on 2017-10-06 (2 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Beta amd64 (20171004)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[QkiZ (qkiz)]

I dont have Wayland session choice, even on Intel gfx card.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 17.10 (artful) reached end-of-life on July 19, 2018.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.