I long have given up on this. However here are two more observations.
Confirming Simon P.'s (simpre) observation that applications are not docked. Another issue: when clicking on the activities button once, it does not show the app overview. It requires a second click. This is also true with any activation (like Meta-L to lock the machine). Another anecdote: Yesterday I did some programming. I locked the machine and put it to sleep (another function that used to work reliably and now is completely broken) but when I came back, it was up and running. The IDE was visible. I could position the cursor and enter text. The text was not echoed on the screen but after unlocking the text was there. If this was crucial code anyone could render it unusable or add to it. @Andrea Azzarone: This is a severe security issue to me and many others. I hope the proposed fix (as noted above) is really fixing this issue and comes out soon. It's a shame that something like this passes rollout (although I have some understanding for that) but even more so the initial ignorance and reluctance to trust hundreds of users that there is an issue that needs quick fixing (which I have no understanding for whatsoever). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-ubuntu-dock in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1769383/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp