Firstly, please run this command to send us more information from the
machine:

  apport-collect 1781826

Secondly, it sounds like some part of the system has crashed. Please:

1. Apply the workaround from bug 994921.

2. Look in /var/crash for crash files and if found run:
     ubuntu-bug YOURFILE.crash
   and tell us the ID of the newly-created bug.

3. If step 2 failed then look at https://errors.ubuntu.com/user/ID where
ID is the contents of the /var/lib/whoopsie/whoopsie-id file on the
machine. Do you find any links to recent problems on the machine? If so
then please send them to us.


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

** Tags added: nvidia

-- 
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/1781826

Title:
  System logout when turn off the screen or suspend Ubuntu 18.04

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  When turn off the screen or suspend, and resume the system is logged
  out, this mostly happens with nvidia driver (390 or 396). I noticed
  that when close the lid and reopen the system is still working and all
  of a sudden it appears a login screen and when login all programs as
  killed as it was logged out. And most of times after login it locks
  and prompts an unlock screen.

  I tried to switch to nouveau driver and the problem seems not to
  happen, but that leaves me with a poor performance in terms of
  graphics.

  I tried to reset the setting in dconf using dconf-editor to reset the
  system recursively, at the beginning seems to be solved but it gets
  back.

  I need to mention that I faced the same problem when using budgie
  flavor, I thought that it might be a budgie problem but it appears to
  be a gnome problem since budgie is based on gnome and on both the
  problem happens when using Nvidia drivers.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1781826/+subscriptions

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