Public bug reported: I am reporting this as a separate bug because the earlier bugs apply to earlier versions of Ubuntu and have been invalidated.
My system is Ubuntu 17.04 (updated not clean install) The problem occurs after a few hours of work. Steps to reproduce: 1. Keep working on the system for some hours 2. Press the Left Win key to get into search mode What happens then: An overview of windows will be displayed. The UI will freeze or become unresponsive. Mouse pointed can be moved around but clicking on any window thumbnail does not give the focus to it Switch to a shell using Ctrl+Alt+F1. Run top. gnome-shell is at the top with 100% CPU usage. I tried disabling some extensions to see if these cause the problem. I also tried changing the gnome-shell theme to default but no impact. Problem remains. If someone could point me to what more information needs to be gathered, I will be happy to provide it. Thanks ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: gnome-shell 3.24.2-0ubuntu0.1 ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15 Uname: Linux 4.10.0-22-generic x86_64 ApportVersion: 2.20.4-0ubuntu4.1 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Jun 19 16:57:19 2017 DisplayManager: lightdm InstallationDate: Installed on 2017-01-16 (154 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) SourcePackage: gnome-shell UpgradeStatus: Upgraded to zesty on 2017-04-17 (62 days ago) ** Affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug zesty -- 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/1698792 Title: gnome-shell hogs cpu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1698792/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs