Public bug reported:

I am trying to run  Weston Wayland X server, in an attempt to get decent
graphics performance.

This is about an NVIDIA Geforce GTX  1060 (driver from PPA `nvidia-370`
(370.28)) and a Phillips bdm4065uc.

Performance tests with 4k video are horrible in standard mir-xorg,
lightdm/gdm,  unity and gnome  sessions.

But I noticed performance is excellent when running steamOS (debian 8.6 based), 
this one uses XWayland.
So I tried to get the same on Ubuntu but failed.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-session
ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
Uname: Linux 4.4.0-43-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Tue Oct 18 10:24:44 2016
InstallationDate: Installed on 2016-10-17 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)

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

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

** Attachment added: ""

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  GUI session crashes on boot

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