It sounds like gnome-shell crashed, which will make everything freeze
and the screen flash for a moment as it restarts. The apps keep running
because Xorg is still running and never crashed. So...
Thank you for taking the time to report this bug and helping to make
Ubuntu better. It sounds like some part of the system has crashed. To
help us find the cause of the crash please follow these steps:
1. Look in /var/crash for crash files and if found run:
ubuntu-bug YOURFILE.crash
Then tell us the ID of the newly-created bug.
2. If step 1 failed then look at https://errors.ubuntu.com/user/ID where
ID is the content of file /var/lib/whoopsie/whoopsie-id on the machine.
Do you find any links to recent problems on that page? If so then please
send the links to us.
3. If step 2 also failed then apply the workaround from bug 994921,
reboot, reproduce the crash, and retry step 1.
Please take care to avoid attaching .crash files to bugs as we are
unable to process them as file attachments. It would also be a security
risk for yourself.
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
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Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1891713
Title:
I am unable to resize windows by clicking on the tops of them and
dragging after gnome-shell restarted due to low performance.
Status in gnome-shell package in Ubuntu:
Incomplete
Bug description:
When I was saving a document, the computer froze, and so did the
desktop, and mouse cursor.
Eventually, the mouse cursor reset its position, and the screen
flashed black but then back to normal. However, I was then unable to
move windows around by clicking and dragging them. I had to manually
minimize and then maximize the window back.
This mostly happened to Visual Studio Code, which was running while I
was saving data in another Java application.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.4-1ubuntu1~20.04.1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 14 16:26:29 2020
DisplayManager: gdm3
InstallationDate: Installed on 2020-07-06 (39 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageVersions: mutter-common 3.36.3-0ubuntu0.20.04.1
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.apport.crashdb.conf: 2020-08-12T16:46:41.139091
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