Thanks! My searches before filing the bug suggested that the log messages were symptoms, but I was unable to find any guideline on how to diagnose further.
I've uninstalled gsconnect (both the Gnome extension, and the accompanying Chrome extension), and fully rebooted. The locks still occur. Some extra information: 1. In trying to pin down the cause, I… - Uninstalled zeitgeist - Disabled tracker: https://gist.github.com/vancluever/d34b41eb77e6d077887c#non-invasive-disable-cheat-sheet Neither of these made a difference. 2. I also identified what seems to be a separate issue: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-desktop- icons/+bug/1826604 3. Finally, I notice differences between the bug in the default 'Ubuntu' session and the 'Ubuntu on Wayland' session. The initial bug report, above, was from 'Ubuntu on Wayland'. In the default 'Ubuntu' session: - The display and keyboard input lock, but the mouse cursor can still be moved. - The 'Key repeat discarded' and 'libinput error' log messages do not occur. Other symptoms (e.g. CPU usage spike for gnome-shell) are the same. -- 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/1826219 Title: Input locks frequently/high CPU usage after 18.10->19.04 upgrade Status in gnome-shell package in Ubuntu: Incomplete Bug description: I recently upgraded from 18.10 to 19.04. What I expected to happen: same performance as before. What happens instead: - I experience frequent locks of input lasting from 0.5–5 seconds, during which: - The mouse cannot be moved or clicked. - Any pressed key is repeated for the duration of the lock. Various events seem to trigger the locks: - Typing this bug report in Google Chrome (locks for 0.5 s every ~20–30 s). - Changing tabs in Google Chrome (locks for 0.5 s). - Changing tabs in the Atom editor (locks for 1–5 s). - Typing in gedit with no other applications running (locks for ~0.5s). Accompanying symptoms: - CPU usage for gnome-shell is high: - Always around 20% - Appears to spike to 100% for longer locks (from eyeballing htop open in gnome-terminal) - The following appear in 'journalctl -f': Apr 24 15:57:30 khaeru-laptop org.gnome.Shell.desktop[31679]: Key repeat discarded, Wayland compositor doesn't seem to be processing events fast enough! Apr 24 15:57:30 khaeru-laptop org.gnome.Shell.desktop[31679]: Window manager warning: last_user_time (169670562) is greater than comparison timestamp (169670067). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around... Apr 24 15:57:30 khaeru-laptop org.gnome.Shell.desktop[31679]: Window manager warning: 0x1800001 appears to be one of the offending windows with a timestamp of 169670562. Working around... Apr 24 15:57:30 khaeru-laptop org.gnome.Shell.desktop[31679]: Window manager warning: W1369 appears to be one of the offending windows with a timestamp of 1798201456. Working around... - The following also appear: Apr 24 15:59:59 khaeru-laptop org.gnome.Shell.desktop[31679]: libinput error: client bug: timer event20 debounce: offset negative (-313ms) Apr 24 15:59:59 khaeru-laptop org.gnome.Shell.desktop[31679]: libinput error: client bug: timer event20 debounce short: offset negative (-326ms) $ lsb_release -rd && apt-cache policy gnome-shell Description: Ubuntu 19.04 Release: 19.04 gnome-shell: Installed: 3.32.0+git20190410-1ubuntu1 Candidate: 3.32.0+git20190410-1ubuntu1 Version table: *** 3.32.0+git20190410-1ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: gnome-shell 3.32.0+git20190410-1ubuntu1 ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6 Uname: Linux 5.0.0-13-generic x86_64 ApportVersion: 2.20.10-0ubuntu27 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Apr 24 15:52:32 2019 DisplayManager: gdm3 EcryptfsInUse: Yes InstallationDate: Installed on 2017-10-11 (559 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) SourcePackage: gnome-shell UpgradeStatus: Upgraded to disco on 2019-04-22 (2 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1826219/+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
