Steps to reproduce (intermittently, ~1 per 10 times):
1. Leave the computer until the screen is blank - two monitors, no multimonitor plugin
2. Move the mouse to unblank the screen
3. Drag lock screen to top + enter password
Actual results
- Ubuntu dock is visible (with app icons)
- Top panel is visible, but with limited options (e.g. no "Sleep" button, no app indicators)
- Empty desktop background
- Clicking the app icon does nothing - there is some animation effect, but it looks like the application would be 'behind' the background
- Clicking "Applications" menu animates but then disappear as well
Partial workaround:
1. Ctrl-Alt-F1
2. Choose the same user and enter password
3. You'll come back to the "empty desktop". But in a few seconds applications appear with a few limitations:
a) Top panel features are still limited (no sleep/power off buttons in menu, no app indicators)
b) Ubuntu dock shows different set of apps on each 1st and 2nd monitor
Might be related to one of the stack traces in journalctl -first is probably when the screen was locked, second when unclodked
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: == Stack trace for context 0x55b45f34c210 ==
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #0 7ffd0163ba40 b resource:///org/gnome/gjs/modules/overrides/GObject.js:468 (7f054eccc040 @ 25)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #1 7ffd0163bae0 b /<email address hidden>/theming.js:416 (7f051f315790 @ 20)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #2 7ffd0163bbd0 b self-hosted:261 (7f054ecc1dc0 @ 223)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #3 7ffd0163bc90 b /<email address hidden>/theming.js:415 (7f051f315700 @ 172)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #4 7ffd0163c910 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #5 55b46572a1c0 i /<email address hidden>/theming.js:424 (7f051f315820 @ 17)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #6 7ffd0163d880 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #7 55b46572a140 i /<email address hidden>/theming.js:89 (7f051f310ee0 @ 42)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #8 7ffd0163e7f0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #9 55b46572a0b8 i /<email address hidden>/docking.js:456 (7f05237fbd30 @ 82)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #10 7ffd0163f760 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #11 55b46572a020 i /<email address hidden>/docking.js:1784 (7f051f30c160 @ 116)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #12 7ffd016406d0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #13 55b4647f2360 i /<email address hidden>/docking.js:1903 (7f051f30c550 @ 37)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #14 7ffd01641640 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #15 55b4647f22e0 i /<email address hidden>/extension.js:31 (7f05237fb4c0 @ 12)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #16 55b4647f2220 i resource:///org/gnome/shell/ui/extensionSystem.js:83 (7f054e85a040 @ 436)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #17 55b4647f21a0 i resource:///org/gnome/shell/ui/extensionSystem.js:354 (7f054e85ab80 @ 13)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #18 7ffd016427b0 b self-hosted:261 (7f054ecc1dc0 @ 223)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #19 55b4647f2120 i resource:///org/gnome/shell/ui/extensionSystem.js:353 (7f054e85aaf0 @ 64)
gru 22 10:23:59 alex-notebook gnome-shell[4475]: ../../../../gobject/gsignal.c:2641: instance '0x55b465d2fb20' has no handler with id '2417542'
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #20 55b4647f20a0 i resource:///org/gnome/shell/ui/extensionSystem.js:371 (7f054e85ac10 @ 87)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #21 7ffd016438f0 b resource:///org/gnome/gjs/modules/signals.js:128 (7f054ecc18b0 @ 386)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #22 7ffd01644510 b resource:///org/gnome/shell/ui/sessionMode.js:208 (7f054e741ca0 @ 254)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #23 55b4647f1f40 i resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #24 55b4647f1eb8 i resource:///org/gnome/shell/ui/sessionMode.js:170 (7f054e741a60 @ 40)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #25 55b4647f1e10 i resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #26 55b4647f1d68 i resource:///org/gnome/shell/ui/screenShield.js:1282 (7f054e7289d0 @ 188)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #27 55b4647f1cc0 i resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #28 55b4647f1c38 i resource:///org/gnome/shell/ui/screenShield.js:902 (7f054e727a60 @ 18)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #29 55b4647f1b90 i resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #30 55b4647f1ad0 i self-hosted:977 (7f054ecf01f0 @ 413)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #31 55b4647f1a00 i resource:///org/gnome/gjs/modules/signals.js:128 (7f054ecc18b0 @ 386)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #32 55b4647f1980 i resource:///org/gnome/shell/ui/lightbox.js:186 (7f054e83e430 @ 29)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #33 55b4647f18e0 i resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (7f054ecdb9d0 @ 54)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #34 55b4647f17c0 i resource:///org/gnome/gjs/modules/tweener/tweener.js:342 (7f054ecdba60 @ 1742)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #35 55b4647f1730 i resource:///org/gnome/gjs/modules/tweener/tweener.js:355 (7f054ecdbaf0 @ 100)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #36 55b4647f16b8 i resource:///org/gnome/gjs/modules/tweener/tweener.js:370 (7f054ecdbb80 @ 10)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #37 55b4647f15e8 i resource:///org/gnome/gjs/modules/signals.js:128 (7f054ecc18b0 @ 386)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #38 55b4647f1558 i resource:///org/gnome/shell/ui/tweener.js:244 (7f054ecd99d0 @ 159)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #39 55b4647f14b0 i resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 10:23:59 alex-notebook org.gnome.Shell.desktop[4475]: #40 55b4647f1430 i resource:///org/gnome/shell/ui/tweener.js:219 (7f054ecd9940 @ 15)
gru 22 10:23:59 alex-notebook gnome-shell[4475]: ../../../../gobject/gsignal.c:2641: instance '0x55b465d2fb20' has no handler with id '2417543'
gru 22 10:23:59 alex-notebook gnome-shell[4475]: ../../../../gobject/gsignal.c:2641: instance '0x55b4615dfee0' has no handler with id '2417544'
gru 22 11:07:43 my-pc gnome-shell[4475]: Object Meta.WindowActor (0x55b4615dfb00), has been already deallocated — impossible to access it. This might be caused by the object having been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs.
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: == Stack trace for context 0x55b45f34c210 ==
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #0 7ffd0163b650 b resource:///org/gnome/gjs/modules/overrides/GObject.js:468 (7f054eccc040 @ 25)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #1 7ffd0163b6f0 b /<email address hidden>/theming.js:416 (7f051f315790 @ 20)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #2 7ffd0163b7e0 b self-hosted:261 (7f054ecc1dc0 @ 223)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #3 7ffd0163b8a0 b /<email address hidden>/theming.js:415 (7f051f315700 @ 172)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #4 7ffd0163c520 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #5 55b46572a9c0 i /<email address hidden>/theming.js:424 (7f051f315820 @ 17)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #6 7ffd0163d490 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #7 55b46572a940 i /<email address hidden>/theming.js:89 (7f051f310ee0 @ 42)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #8 7ffd0163e400 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #9 55b46572a8b8 i /<email address hidden>/docking.js:456 (7f05237fbd30 @ 82)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #10 7ffd0163f370 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #11 55b46572a820 i /<email address hidden>/docking.js:1784 (7f051f30c160 @ 116)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #12 7ffd016402e0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #13 55b46572a7a0 i /<email address hidden>/docking.js:1903 (7f051f30c550 @ 37)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #14 7ffd01641250 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #15 55b46572a720 i /<email address hidden>/extension.js:31 (7f05237fb4c0 @ 12)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #16 55b46572a660 i resource:///org/gnome/shell/ui/extensionSystem.js:83 (7f054e85a040 @ 436)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #17 55b46572a5e0 i resource:///org/gnome/shell/ui/extensionSystem.js:354 (7f054e85ab80 @ 13)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #18 7ffd016423c0 b self-hosted:261 (7f054ecc1dc0 @ 223)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #19 55b46572a560 i resource:///org/gnome/shell/ui/extensionSystem.js:353 (7f054e85aaf0 @ 64)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #20 55b46572a4e0 i resource:///org/gnome/shell/ui/extensionSystem.js:371 (7f054e85ac10 @ 87)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #21 7ffd01643500 b resource:///org/gnome/gjs/modules/signals.js:128 (7f054ecc18b0 @ 386)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #22 7ffd01644350 b resource:///org/gnome/shell/ui/sessionMode.js:208 (7f054e741ca0 @ 254)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #23 7ffd01644fd0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #24 55b46572a2c8 i resource:///org/gnome/shell/ui/sessionMode.js:177 (7f054e741af0 @ 100)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #25 7ffd01645f50 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #26 55b46572a220 i resource:///org/gnome/shell/ui/screenShield.js:1210 (7f054e7288b0 @ 105)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #27 7ffd01646ed0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #28 55b46572a1a0 i resource:///org/gnome/shell/ui/screenShield.js:1200 (7f054e728790 @ 73)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #29 7ffd01647e50 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #30 55b46572a110 i resource:///org/gnome/shell/ui/screenShield.js:627 (7f054e727040 @ 83)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #31 7ffd01648dd0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #32 55b46572a058 i resource:///org/gnome/shell/ui/screenShield.js:790 (7f054e727700 @ 397)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #33 7ffd01649db0 b resource:///org/gnome/gjs/modules/_legacy.js:82 (7f054ecb0b80 @ 71)
gru 22 11:07:43 my-pc org.gnome.Shell.desktop[4475]: #34 7ffd0164a9e0 b self-hosted:979 (7f054ecf01f0 @ 440)
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gnome-shell 3.30.1-2ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17
Uname: Linux 4.18.0-12-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Dec 22 11:13:09 2018
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
InstallationDate: Installed on 2018-07-28 (146 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to cosmic on 2018-11-03 (49 days ago)
Status changed to 'Confirmed' because the bug affects multiple users.