Bug when switching between users

[SYN-2009]

Hello,

In Ubuntu 18.04 there is a serious bug that manifests itself when switching between users. This is not every time, but often. When I try to switch to another user, after entering the password, I get a clean screen, there are no calls to the hard drive. The computer is reset by the reset button.

Thank you.
---
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-05-06 (34 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
NonfreeKernelModules: nvidia
Package: gdm3 3.28.0-0ubuntu1
PackageArchitecture: amd64
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Tags: bionic
Uname: Linux 4.15.0-22-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

_MarkForUpload: True

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1776002/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1776002

When reporting bugs please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[SYN-2009 (ra9uek)]

apport information

[SYN-2009 (ra9uek)]

apport information

[SYN-2009 (ra9uek)]

Unfortunately I do not know the name of the package. If an error occurs, no proposals are sent to send the report. I described it as I see it. I can add that at the same time there arises a message that authentication is not passed, although the password is entered correctly. In earlier versions of ubuntu this did not happen. I gave Launchpad.net the license for 1 week.

[Daniel van Vugt (vanvugt)]

This sounds like bug 1766137 and the secondary bug mentioned within that. It was fixed for 18.04 only 14 hours ago (https://launchpad.net/ubuntu/+source/gdm3/3.28.2-0ubuntu1.2)

Please update your system and retest. If the problem persists then please run:

  dpkg -l > dpkg.txt

and send us the resulting dpkg.txt

[SYN-2009 (ra9uek)]

Ok, now the error does not arise. If it shows up again, I will report it here.
Thank you.