The backported input thread patches mainly laid a foundation to solve this issue. Mutter still needs more work to take advantage of the new input thread. That is why there isn't an improvement in GNOME 40.
This is described here: https://blogs.gnome.org/shell-dev/2021/01/21 /threaded-input-adventures/ > The main thread is still in charge of KMS, and updating the cursor plane buffer and position. This means the pointer cursor will still freeze if the main thread stalled, despite the input thread handling events underneath. In the future, There would be another separate thread handling atomic KMS operations, so it’d be possible for the input and KMS threads to talk between them and bypassing any main thread stalls. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1690719 Title: Mouse pointer randomly pauses/stutters in gnome shell Wayland sessions Status in GNOME Shell: Unknown Status in gnome-shell package in Ubuntu: Triaged Status in mutter package in Ubuntu: Triaged Bug description: The mouse pointer randomly pauses/stutters in Gnome Shell (Wayland). It's not reliably smooth like you would see in Xorg or Mir demo servers. Feels like there is a blocking call being made in a GUI thread that shouldn't have any blocking calls. Although it's not clear if this is just a problem with pointer input or the shell compositing in general. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.24.2-0ubuntu2 ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8 Uname: Linux 4.10.0-20-generic x86_64 ApportVersion: 2.20.4-0ubuntu7 Architecture: amd64 Date: Mon May 15 13:23:22 2017 DisplayManager: lightdm GsettingsChanges: b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" b'org.gnome.desktop.interface' b'scaling-factor' b'uint32 1' InstallationDate: Installed on 2017-05-03 (12 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1690719/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
