Alright then, let's consider
https://gitlab.gnome.org/GNOME/mutter/issues/3 as the upstream bug here.
Unfortunately we can't link to gitlab bugs properly from Launchpad yet.
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Changed in: gnome-shell (Ubuntu)
Importance: Low => Medium
** Changed in: mutter (Ubuntu)
Importance: Undecided => Medium
** Changed in: gnome-shell (Ubuntu)
Status: New => Confirmed
** Changed in: mutter (Ubuntu)
Status: New => Confirmed
** Summary changed:
- Framerate drops when moving windows across physical displays
+ Very poor multi-monitor performance in Wayland sessions
** Changed in: gnome-shell (Ubuntu)
Assignee: (unassigned) => Daniel van Vugt (vanvugt)
** Changed in: mutter (Ubuntu)
Assignee: (unassigned) => Daniel van Vugt (vanvugt)
** Changed in: gnome-shell (Ubuntu)
Status: Confirmed => In Progress
** Changed in: mutter (Ubuntu)
Status: Confirmed => In Progress
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https://bugs.launchpad.net/bugs/1730460
Title:
Very poor multi-monitor performance in Wayland sessions
Status in gnome-shell package in Ubuntu:
In Progress
Status in mutter package in Ubuntu:
In Progress
Bug description:
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)
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