dreamcat4, This bug is specifically about Wayland sessions. I now realize if you see similar problems in Xorg then that's a problem with the Xorg graphics drivers so please open a new bug for Xorg.
** Description changed: - Upstream bugs: + Upstream bug: https://gitlab.gnome.org/GNOME/mutter/issues/3 - https://gitlab.gnome.org/GNOME/mutter/issues/503 --- When dragging a window between displays, I can see cpu usage increase while framerate drops dramatically to single numbers. Desktop scaling is 1.0, one is a WXGA screen and another FHD. Ubuntu session (wayland), 17.10. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.1-0ubuntu5 ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4 Uname: Linux 4.13.0-16-lowlatency x86_64 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 CurrentDesktop: Unity:Unity7:ubuntu Date: Mon Nov 6 17:09:20 2017 DisplayManager: lightdm GsettingsChanges: b'org.gnome.shell' b'favorite-apps' b"['/home/development/bin/firefox.desktop', 'org.gnome.Nautilus.desktop', 'jetbrains-phpstorm.desktop', 'code.desktop', 'postman.desktop', 'standard_notes.desktop']" b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" b'org.gnome.desktop.interface' b'icon-theme' b"'ePapirus'" b'org.gnome.desktop.interface' b'gtk-theme' b"'DarkNumix'" InstallationDate: Installed on 2016-03-13 (603 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307) SourcePackage: gnome-shell UpgradeStatus: Upgraded to artful on 2017-10-19 (17 days ago) ** Bug watch added: gitlab.gnome.org/GNOME/mutter/issues #3 https://gitlab.gnome.org/GNOME/mutter/issues/3 ** Also affects: mutter via https://gitlab.gnome.org/GNOME/mutter/issues/3 Importance: Unknown Status: Unknown ** Changed in: gnome-shell (Ubuntu) Status: In Progress => Invalid ** Changed in: gnome-shell (Ubuntu) Assignee: Daniel van Vugt (vanvugt) => (unassigned) ** Changed in: gnome-shell (Ubuntu) Importance: Medium => Undecided -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1730460 Title: Very poor multi-monitor performance in Wayland sessions To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1730460/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
