** Description changed: - https://gitlab.gnome.org/GNOME/mutter/issues/334 + Upstream bug: https://gitlab.gnome.org/GNOME/mutter/issues/334 + Upstream fix: https://gitlab.gnome.org/GNOME/mutter/merge_requests/281 --- Xorg sessions have higher output lag than Wayland sessions. Test case: Grab a window with the mouse and drag it around smoothly. Expected: the same minimal gap between the cursor and the window's title bar in both Xorg and Wayland sessions. Observed: a bigger gap (higher latency) in Xorg sessions. I only realized this was a bug when I stumbled on a fix while experimenting with the presentation timing logic in mutter, so assigning to myself. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: mutter 3.30.0-4 ProcVersionSignature: Ubuntu 4.18.0-8.9-generic 4.18.7 Uname: Linux 4.18.0-8-generic x86_64 ApportVersion: 2.20.10-0ubuntu11 Architecture: amd64 Date: Sun Oct 7 17:22:48 2018 InstallationDate: Installed on 2018-05-26 (133 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180525) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_AU.UTF-8 SHELL=/bin/bash SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install)
** Bug watch added: gitlab.gnome.org/GNOME/mutter/issues #334 https://gitlab.gnome.org/GNOME/mutter/issues/334 ** Also affects: fmutter via https://gitlab.gnome.org/GNOME/mutter/issues/334 Importance: Unknown Status: Unknown ** Project changed: fmutter => mutter -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1796549 Title: Xorg sessions have higher output lag than Wayland sessions To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1796549/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
