Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-shell (Ubuntu)
Status: New => Confirmed
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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)
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