Public bug reported:
Observed behaviour: resuming from screensaver, after unlocking the
screen with a password, the desktop is shown briefly and is immediately
locked again, but with a different look-and-feel lock screen. Entering
the password once more will finally show the desktop. This started
happening seemingly sporadically, and would continue to happen
consistently until end of session (logout or shutdown).
Digging further, it was found that a `gnome-screensaver` process was
running in addition to the normal `cinnamon-screensaver`. It was a child
process of `systemd --user`, so a `ps -o pid,comm,cgroup` found that it
was running as part of `dbus.service`.
Finally, the culprit was found in the journal for that unit (`dbus.service`):
Nov 12 15:03:40 laptop dbus-daemon[1696]: [session uid=1000 pid=1696]
Activating service name='org.gnome.ScreenSaver' requested by ':1.206' (uid=1000
pid=3445 comm="/usr/bin/totem --gapplication-service " label="unconfined")
So, the workaround (which I am quite happy with, frankly) is to use VLC
instead of Totem. ☺
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: cinnamon-session 3.6.1-1
ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
Uname: Linux 4.15.0-38-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: X-Cinnamon
Date: Tue Nov 13 08:56:37 2018
InstallationDate: Installed on 2018-10-31 (12 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: cinnamon-session
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: cinnamon-session (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1803078
Title:
Screensaver unlock screen shown twice after playing video
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