Hi Paul, thanks for pointing me to this bug from https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1827791.
Is this also on a Dell XPS 13 9380? Your comment about Wayland made me curious, as I was using the default Xorg session. Testing with Wayland on 19.04 I also see the same problem (actually I think it's more prominent with Wayland than it was with Xorg). I also see lines like this in journalctl -b0: May 13 21:34:46 daniel-XPS-13-9380 org.gnome.Shell.desktop[1673]: Window manager warning: last_user_time (242191) is greater than comparison timestamp (242190). This most likely represents a buggy client sending inaccurate timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work around... May 13 21:34:46 daniel-XPS-13-9380 org.gnome.Shell.desktop[1673]: Window manager warning: W1 appears to be one of the offending windows with a timestamp of 242191. Working around... And: May 13 21:41:21 daniel-XPS-13-9380 org.gnome.Shell.desktop[1673]: libinput error: event5 - DELL08AF:00 06CB:76AF Touchpad: kernel bug: Touch jump detected and discarded. May 13 21:41:21 daniel-XPS-13-9380 org.gnome.Shell.desktop[1673]: See https://wayland.freedesktop.org/libinput/doc/1.12.6/touchpad-jumping-cursors.html for details -- 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: Confirmed 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
