*** This bug is a duplicate of bug 1769383 ***
https://bugs.launchpad.net/bugs/1769383
OK. I will mark this as a duplicate of bug 1769383 until proven
otherwise.
** This bug has been marked a duplicate of bug 1769383
Ubuntu dock/launcher is shown on the lock screen
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https://bugs.launchpad.net/bugs/1813139
Title:
Screen unlocked after resume, black flickering
Status in gnome-shell package in Ubuntu:
Incomplete
Bug description:
I have been experiencing an issue only since a week or so, which I have
reportedly also heard from a colleague of mine (2018 Dell XPS 13) since much
longer.
My hardware is a Lenovo Thinkpad L480 with i5-8250u.
When using stock ubuntu 18.04.1, sometimes and sporadically (1 out of
3 or so) after resuming from suspend, the screen would not be locked
and flicker, switching between a fully black screen and the previously
(before going to standby) displayed content, which I regard as a
security issue. The GUI is not responsive, however I can workaround
using ctrl-alt-F1 and login using my password to "semi"-restore
functionality. The flickering is then gone, but e.g. the dock doesn't
respond correctly and my notifications are missing, until I restart
gnome-shell. This then leaves me with a fully functional system again,
which is why I have not regarded my issue the same as other bug
reports, which report a system freeze.
I have tried using gnome-session instead of ubuntu-session for the
past day as of writing this report and have NOT yet experienced the
issue again, so I assume it has something to do with ubuntu's theme or
alike.
Please provide information which log files could be helpful and I am going to
try and reproduce the issue on ubuntu-session.
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ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2019-01-03 (20 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
Package: gnome-shell 3.28.3-0ubuntu0.18.04.4
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-43-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
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