Public bug reported:

I have a notebook with dual graphic cards: Intel+Nvidia (handled by
nouveau). The miniDP port is apparently connected to nvidia since it
stops working when I use nouveau.modeset=0. I am able to start a Wayland
session when there's no secondary monitor connected; as soon as I
connect it to miniDP the wayland session crashes and falls back to the
greeter. The greeter won't even start Wayland session - it immediately
crashes back to the greeter. Workaround is to use the Xorg-based session
which works properly with secondary monitor.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.27.92-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Mar 13 22:34:37 2018
DisplayManager: gdm3
 b'' b'enabled-extensions' 
 b'' b'command-history' b"['r']"
 b'' b'favorite-apps' b"['firefox.desktop', 'rhythmbox.desktop', 
'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'yelp.desktop', 
'chromium-browser.desktop', 'thunderbird.desktop']"
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
 b'org.gnome.desktop.interface' b'scaling-factor' b'uint32 1'
InstallationDate: Installed on 2016-09-05 (554 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to bionic on 2018-03-13 (0 days ago)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug bionic third-party-packages

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  ubuntu wayland crashes when I attach secondary monitor

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