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
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risk for yourself.


** Changed in: gnome-shell (Ubuntu)
       Status: New => Incomplete

-- 
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/1914573

Title:
  Gnome desktop crash and return to login screen

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  The bug is that all at a sudden gnome reset to login screen. When i
  log again, the only "sound output" allowed is simulation, my devices
  are not displayed.

  I'm using 
  - Ubuntu 20.04 (I upgraded from 18 some months ago, I don't think this bug 
was present at that moment but i used less my ubuntu station). 
  - Portable PC

  The bug happen
  - When I use my PC with screen pluged directly : some times
  - When I use my docking station with 144Hz display in DVI 
(https://i-tec.pro/fr/produkt/u3hdmidvidock-4/) : quite frequently
  - When à Use my docking station and watch some full screen video : very 
frequently

  It seems to be linked to displayLink use, but not only because it
  happen too when i don't use the docking station. It seems to be
  frequently when i "Stress" the screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: gnome-shell 3.36.4-1ubuntu1~20.04.2
  ProcVersionSignature: Ubuntu 5.4.0-65.73-generic 5.4.78
  Uname: Linux 5.4.0-65-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.16
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Feb  4 10:17:54 2021
  DisplayManager: gdm3
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-11-08 (1183 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 
(20170801)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  RelatedPackageVersions: mutter-common 3.36.7+git20201123-0.20.04.1
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to focal on 2020-07-01 (217 days ago)

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