Krister, Other people are saying that kernel 4.15 has fixed the problem. Can you please try testing it by booting this?
http://cdimages.ubuntu.com/daily-live/current/ ** Changed in: gdm3 (Ubuntu) Status: New => Incomplete ** Changed in: mutter (Ubuntu) Status: New => Incomplete ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Changed in: linux (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1749975 Title: Flickering screen with ultra-wide monitor in Wayland mode Status in gdm3 package in Ubuntu: Incomplete Status in linux package in Ubuntu: Incomplete Status in mutter package in Ubuntu: Incomplete Bug description: 1. leave computer until gnome-shell blanks the screen (monitor goes to sleep) 2. clear GDM screen by swiping up. There is a video flicker now when I interact with computer. Usually small, but can cover many different UI elements. This does not happen if I use the X backend instead of wayland. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.2-0ubuntu0.1 ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13 Uname: Linux 4.13.0-32-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Feb 16 16:07:12 2018 DisplayManager: gdm3 GsettingsChanges: b'org.gnome.shell' b'enabled-extensions' b"['workspace-g...@mathematical.coffee.gmail.com', 'alt-tab-worksp...@kwalo.net', 'system-moni...@paradoxxx.zero.gmail.com', 'user-th...@gnome-shell-extensions.gcampax.github.com', 'ubuntu-d...@ubuntu.com', 'ubuntu-appindicat...@ubuntu.com']" b'org.gnome.shell' b'enable-hot-corners' b'true' b'org.gnome.shell' b'favorite-apps' b"['googleinbox.desktop', 'googlecalendar.desktop', 'org.gnome.Nautilus.desktop', 'firefox.desktop']" b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" b'org.gnome.desktop.interface' b'monospace-font-name' b"'Ubuntu Mono 11'" InstallationDate: Installed on 2018-01-05 (42 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) SourcePackage: gnome-shell UpgradeStatus: Upgraded to artful on 2018-01-05 (42 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1749975/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp