Can see and interact with dock on lock screen

[Stuart]

When I lock my screen, or the session becomes locked due to inactivity, I can see and interact with the dock on the lock screen.

I am able to launch applications, though I cannot see the applications or interact with them until I log in. But upon logging in, those applications are open.

I am using the dash-to-dock extension.

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-screensaver 3.6.1-8ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 26 09:44:25 2018
InstallationDate: Installed on 2018-03-24 (1 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
SourcePackage: gnome-screensaver
Symptom: security
Title: Screen locking issue
UpgradeStatus: Upgraded to bionic on 2018-03-26 (0 days ago)

[Stuart (shutch)]

stuart@SSH-NUC:/var/crash$ sudo journalctl /usr/bin/gnome-shell -r
-- Logs begin at Sat 2018-03-24 21:14:44 EDT, end at Mon 2018-03-26 10:19:44 EDT. --
Mar 26 10:19:42 SSH-NUC gnome-shell[1537]: [AppIndicatorSupport-DEBUG] Registering StatusNotifierItem :1.106/org/ayatana/NotificationItem/software_update_available
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #36 0x7ffd86604e00 b resource:///org/gnome/gjs/modules/overrides/Gio.js:129 (0x7faae82e0890 @ 39)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #35 0x7ffd86604d30 I resource:///org/gnome/gjs/modules/signals.js:126 (0x7faae82cff78 @ 386)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #34 0x55a3bc79cad0 i resource:///org/gnome/shell/ui/screenShield.js:540 (0x7faace44cd58 @ 13)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #33 0x7ffd86604100 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7faae82b4de0 @ 71)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #32 0x55a3bc79cb50 i resource:///org/gnome/shell/ui/screenShield.js:1196 (0x7faace44f670 @ 46)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #31 0x7ffd86603500 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7faae82b4de0 @ 71)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #30 0x55a3bc79cbd0 i resource:///org/gnome/shell/ui/unlockDialog.js:147 (0x7faace48d450 @ 25)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #29 0x7ffd86602900 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7faae82b4de0 @ 71)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #28 0x55a3bc79cc58 i resource:///org/gnome/shell/gdm/authPrompt.js:499 (0x7faace47cef0 @ 61)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #27 0x55a3bc79cce0 i resource:///org/gnome/shell/ui/screenShield.js:1196 (0x7faace44f6f8 @ 17)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #26 0x7ffd86601630 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7faae82b4de0 @ 71)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #25 0x55a3bc79cd60 i resource:///org/gnome/shell/ui/screenShield.js:1210 (0x7faace44f780 @ 159)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #24 0x7ffd86600a30 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7faae82b4de0 @ 71)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #23 0x55a3bc79ce08 i resource:///org/gnome/shell/ui/sessionMode.js:174 (0x7faace46e1a8 @ 100)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #22 0x7ffd865ffe30 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7faae82b4de0 @ 71)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #21 0x7ffd865ffdd0 b resource:///org/gnome/shell/ui/sessionMode.js:205 (0x7faace46e340 @ 254)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #20 0x7ffd865ffd10 I resource:///org/gnome/gjs/modules/signals.js:126 (0x7faae82cff78 @ 386)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #19 0x7ffd865ffc90 b resource:///org/gnome/shell/ui/extensionSystem.js:359 (0x7faae805c918 @ 67)
Mar 26 10:19:42 SSH-NUC org.gnome.Shell.desktop[1537]: #18 0x55a3bc79ce98 i resource:///org/gnome/shell/ui/extensionSystem.js:331 (0x7faae805c6f8 @ 76)
Mar 26 10:19:42 SSH-NU...

[Daniel van Vugt (vanvugt)]

Oh, nevermind. Duplicate of bug 1724630. It is a problem with the dashtodock extension.

[Stuart (shutch)]

@Daniel - thanks, again. I tried uninstalling and reinstalling both gnome-shell-extension-ubuntu-dock and gnome-shell-extension-dashtodock. Neither fixed it.

But rather, now, when I lock the screen, the screen turns black and turns off and re-awakens on keyboard/mouse movement.