Please push out a fix for this ASAP, once this tight loop is hit the machine becomes an unusable 100% CPU using mess. I know of several others suffering exactly the same bug.
For me this can be reproduced by having a terminal using half the screen (using CMD+LEFT), then switching to fullscreen (F11) and back (F11). Repeating this some number of times triggers this tight loop of 100% CPU usage. After that, it's difficult to get window focus and windows are slow to respond to anything. To recover I use `killall -3 gnome-shell`, which allows Gnome to restart but then has the delightful affect of throwing windows around the screen randomly and forgetting there are multiple monitors. -- 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/1880405 Title: High CPU and journal flooded with: JS ERROR: TypeError: null has no properties _onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9 Status in GNOME Shell: Unknown Status in gnome-shell package in Ubuntu: Confirmed Bug description: O.k. it is an old Lenovo thinkpad T410. However, in 18.04, 19.04 and 19.10 I did face these problems. The sometimes I have to wait 10 seconds to see if a window reacts or not. It is hard to use. Installiert: 3.36.1-5ubuntu2 Installationskandidat: 3.36.2-1ubuntu1~20.04.1 Versionstabelle: 3.36.2-1ubuntu1~20.04.1 500 500 http://it.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages *** 3.36.1-5ubuntu2 100 100 /var/lib/dpkg/status 3.36.1-5ubuntu1 500 500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-shell 3.36.1-5ubuntu2 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 Uname: Linux 5.4.0-29-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: GNOME-Classic:GNOME Date: Sun May 24 15:43:34 2020 DisplayManager: gdm3 InstallationDate: Installed on 2020-02-05 (109 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) RelatedPackageVersions: mutter-common 3.36.2-1ubuntu1~20.04.1 SourcePackage: gnome-shell UpgradeStatus: Upgraded to focal on 2020-05-08 (15 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1880405/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
