Interesting, thanks I will try that fix. I do agree that it's not good that
it's still occurring as it's present on vanilla installs straight out of
the box

On Mon, 24 Dec 2018, 21:05 Yan Li <<email address hidden> wrote:

> While I wholeheartedly agree that we urgently need an official fix, I
> also want to point out that
>
> gsettings set org.gnome.shell.extensions.dash-to-dock transparency-mode
> FIXED
>
> is an effective workaround for me. On my Cosmic, I have never seen the
> dock again on the lock screen. I'm using vanilla Ubuntu docker with no
> dash-to-docker or any other customization to the dock.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1769383
>
> Title:
>   Ubuntu dock/launcher is shown on the lock screen
>
> Status in gnome-shell package in Ubuntu:
>   Invalid
> Status in gnome-shell-extension-ubuntu-dock package in Ubuntu:
>   Fix Released
> Status in gnome-shell source package in Bionic:
>   Invalid
> Status in gnome-shell-extension-ubuntu-dock source package in Bionic:
>   In Progress
> Status in gnome-shell source package in Cosmic:
>   Invalid
> Status in gnome-shell-extension-ubuntu-dock source package in Cosmic:
>   In Progress
> Status in gnome-shell source package in Disco:
>   Invalid
> Status in gnome-shell-extension-ubuntu-dock source package in Disco:
>   Fix Released
>
> Bug description:
>   [Impact]
>   When entering the lock-screen mode, gnome-shell disables all the
> extensions. It can happen that under certain conditions ubuntu-dock
> re-enables itself, causing the ubuntu-dock to appear in the lock-screen,
> exposing sensitive information. One possible way to reproduce this is to
> enable dash-to-dock and ubuntu-dock at the same time.
>
>   [Test Case]
>   1. Make sure ubuntu-dock is enabled
>   2. Enable dash-to-dock too
>   3. Lock the screen
>   4. Make sure the dock does not appear on the lock screen
>   5. Make sure there is no warning is the journal
>
>   [Possible Regressions]
>   Even if it's something we don't really support please make sure that you
> can use dash-to-dock without uninstalling ubuntu-dock.
>
>   [Original Bug]
>
>   After an update from ubuntu 16.04 to 18.04 the dock is aviable on the
> lockscreen after user login.
>   I did not configure this knowingly. Also i can start every application
> which is available on the dock.
>   Settings, virtual box, visualstudio code and so on.
>
>   After the update to 18.04 i just configure the screen frequency to
>   144Hz and the night mode on. And attach the dock on bottom.
>
>   I later undid these customizations back to configuration before, but
>   the dock is stil aviable on lockscreen.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 18.04
>   Package: gnome-settings-daemon 3.28.1-0ubuntu1
>   ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
>   Uname: Linux 4.15.0-20-generic x86_64
>   NonfreeKernelModules: nvidia_modeset nvidia
>   ApportVersion: 2.20.9-0ubuntu7
>   Architecture: amd64
>   CurrentDesktop: ubuntu:GNOME
>   Date: Sat May  5 18:30:16 2018
>   InstallationDate: Installed on 2018-04-08 (27 days ago)
>   InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64
> (20180228)
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=de_DE.UTF-8
>    SHELL=/bin/bash
>   SourcePackage: gnome-settings-daemon
>   UpgradeStatus: Upgraded to bionic on 2018-05-01 (3 days ago)
>   ---
>   ApportVersion: 2.20.9-0ubuntu7
>   Architecture: amd64
>   CurrentDesktop: ubuntu:GNOME
>   DistroRelease: Ubuntu 18.04
>   InstallationDate: Installed on 2018-04-08 (27 days ago)
>   InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64
> (20180228)
>   NonfreeKernelModules: nvidia_modeset nvidia
>   Package: gnome-shell-extension-ubuntu-dock 0.9.1
>   PackageArchitecture: all
>   ProcEnviron:
>    TERM=xterm-256color
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=de_DE.UTF-8
>    SHELL=/bin/bash
>   ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
>   Tags:  bionic
>   Uname: Linux 4.15.0-20-generic x86_64
>   UpgradeStatus: Upgraded to bionic on 2018-05-01 (4 days ago)
>   UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
>   _MarkForUpload: True
>
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>
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>