No Ubuntu wayland option when swiching user with automatic login

[Zaris]

In system with multiple user account with automatic login enabled, automatic login works as expected, after reboot I get the wayland session for that account. But when switching to another account there is no Ubuntu desktop option, only Ubuntu on Xorg, Unity and some others like LXDE I have installed.
Without automatic login, I can select Ubuntu for all sessions and it's the default.
I did't do a fresh install but have upgraded the system from 17.04.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gdm3 3.26.0-1ubuntu1
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 10:59:38 2017
InstallationDate: Installed on 2016-05-21 (505 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: gdm3
UpgradeStatus: Upgraded to artful on 2017-09-24 (13 days ago)
mtime.conffile..etc.gdm3.custom.conf: 2017-10-08T10:29:05.856039

[Daniel van Vugt (vanvugt)]

I find that the same happens randomly without automatic login, and without even logging in a first time. Just randomly some login options including the Ubuntu wayland one are missing. Have to reboot once or twice to get the option back.

[Sebastien Bacher (seb128)]

Thank you for your bug report, could you enable gdm debugging but uncommenting the corresponding line in /etc/gdm3/custom.conf and add your syslog after reproducing the issue?

[Zaris (zaris)]

My syslog with gdm debug.
There seems to be left overs from history, I have not done clean install in years.

[Daniel van Vugt (vanvugt)]

I discovered recently that one way to make the Wayland login options vanish is to have any bug in the mutter eglnative backend that triggers an assertion. gnome-shell doesn't treat this as fatal, but it does remove Wayland options from the list of login sessions in that case.

So this assertion from your log might be relevant:

loka 08 10:50:57 username-System-Product-Name gnome-shell[2848]: setup_framebuffers: assertion 'width > 0' failed

Or it might be one of the other gnome-shell assertions in your log.

[Launchpad Janitor (janitor)]

[Expired for gdm3 (Ubuntu) because there has been no activity for 60 days.]