Ubuntu Dock gets replaced with a standard GNOME one after a while

I think this doesn't happen anymore, didn't check logs but the dock is there for more than 7 days now. Yay! :)

I don't see a button to close it, so anyone who does -- feel free to.

Thanks for the update, it's weird if it got away without a real fix, maybe it's transient. Setting as incomplete for now, please provide the informations if you hit the issue again, thx

Ok, so it happened again, but it took 15 days this time :)

Attaching journalctl -x -n1000

[Expired for gnome-shell-extension-ubuntu-dock (Ubuntu) because there has been no activity for 60 days.]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]

Status changed to 'Confirmed' because the bug affects multiple users.

the log has this warning, unsure if that's what makes the dock unload though?

JS WARNING: [/<email address hidden>/docking.js 1778]: reference to undefined property "_workspaceIsolation"

Yeah. Also, once again, this didn't happen in quite some time and with big uptimes. I wouldn't bother until many more people confirm.

Same problem here (I think).

Stock Ubuntu 18.04.1 LTS
gnome-shell-extension-ubuntu-dock version 0.9.1ubuntu18.04.1

The dock has disappeared overnight (pretty sure that it's not related to any updates, since auto-updates are off and /var/log/apt/history.log does not show any installs/upgrades more recent than January 14.) I still have a gray bar with the time on top and the word "Activities" in the top left corner. It shows up if I click on "Activities" or press the Windows key on the keyboard, then disappears again.

Options in the "Dock" tab in Ubuntu settings (Auto-hide, Position on screen) have no effect.

Unlike the original reporter, my system was rebooted about 24 hours ago.

Reviewing the event journal, I see the following appear last evening:

Jan 28 21:21:56 aidev-System-Product-Name gnome-shell[3405]: JS WARNING: [/<email address hidden>/docking.js 1778]: reference to undefined property "_workspaceIsolation"
(...)
Jan 28 21:22:25 aidev-System-Product-Name gnome-shell[3405]: g_array_unref: assertion 'array' failed
Jan 28 21:22:25 aidev-System-Product-Name upowerd[2154]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.3/3-1.3:1.2/0003:046D:C52B.0139/0003:046D:200A.013B
Jan 28 21:22:25 aidev-System-Product-Name upowerd[2154]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.3/3-1.3:1.2/0003:046D:C52B.0139
Jan 28 21:22:25 aidev-System-Product-Name upowerd[2154]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.3/3-1.3:1.2
Jan 28 21:22:25 aidev-System-Product-Name upowerd[2154]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.3
Jan 28 21:22:29 aidev-System-Product-Name /usr/lib/gdm3/gdm-x-session[3271]: (--) NVIDIA(GPU-0): DFP-0: disconnected
(...)
Jan 28 21:22:29 aidev-System-Product-Name /usr/lib/gdm3/gdm-x-session[3271]: (--) NVIDIA(GPU-0): DFP-6: disconnected
Jan 28 21:22:29 aidev-System-Product-Name /usr/lib/gdm3/gdm-x-session[3271]: (--) NVIDIA(GPU-0): DFP-6: Internal TMDS
Jan 28 21:22:29 aidev-System-Product-Name /usr/lib/gdm3/gdm-x-session[3271]: (--) NVIDIA(GPU-0): DFP-6: 165.0 MHz maximum pixel clock
Jan 28 21:22:29 aidev-System-Product-Name /usr/lib/gdm3/gdm-x-session[3271]: (--) NVIDIA(GPU-0):
Jan 28 21:22:29 aidev-System-Product-Name gnome-shell[3405]: JS ERROR: TypeError: this._workspaceIsolation is undefined
                                                             DockManager<._deleteDocks@/<email address hidden>/docking.js:1778:9
                                                             wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
                                                             DockManager<._toggle@/<email address hidden>/docking.js:1662:9
                                                             wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22

(I think the dock was still up after 21:22, but I'm not positive.)

There are lots of other recurrent Gnome-related errors in the log, which may or may not be related. These include:

Jan 29 12:30:20 aidev-System-P...

Ok, happened again :( After such a long time, I was hoping it's gone. Sorry for spamming.

Have same issue with same error message.
For now every time it happens, I run `Alt+f2` and run `r` command.

It's happening very frequently for me again. I decided to wait for 20.04 basically, meanwhile the "fix" i've found is to go to https://extensions.gnome.org/extension/307/dash-to-dock/ and uninstall-install the extension, it would bring the dock back without a need to reboot.

This seems to only happen to me after a period of inactivity, as i've only seen the dock disappear after logging back in from the lock screen. I can't reproduce it, other than to say it happens about once every week or two.

My go-to solution was to log out and log in again, though I can confirm that Yeou Sunn's workaround of "alt+f2" and "r" works. I'll be doing that for now until a fix is found.

I get this quite regularly, thanks to the participants of this for the work around, very useful. But this is definitely still a problem.

This bug was fixed in the package gnome-shell-extension-ubuntu-dock - 67ubuntu20.04.3

---------------
gnome-shell-extension-ubuntu-dock (67ubuntu20.04.3) focal; urgency=medium

  [ Marco Trevisan (Treviño) ]
  * docking: Don't use non-existent Utils.DisplayWrapper.getWorkspaceManager()
  * dash: Use clutter alignment to ensure we properly arrange the dash
  * metadata: Set extension compatible with shell 3.36 only
  * dash: Sync some more to the upstream cleanups
  * docking: Properly replace default dash in all modes (LP: #1795703,
    LP: #1865865)
  * docking: Delay hide requests if we're currently showing
  * docking: Don't sync overview's iconSize anymore
  * docking: Reset old dash changes if something changes it (LP: #1795703)
  * docking: Cleanup the docks destruction code
  * docking: Use parent vfunc results to get slider container sizes
  * docking: Add mainDock property to DockManager and use it
  * docking: Don't pass allDocks to every child
  * docking: Ignore key-repeat
  * fileManager1API: Use a cancellable to stop proxy creation on destruction
  * dash: Cleanup preferred width/height vfuncs reusing upstream code
  * dash: Get content box from the themeNode
  * dash: Some code cleanups to match Upstream code better
  * appIcons: Redirect events from the showAppIcon toggleButton to the parent
  * general: Don't use Gtk enum definitions for St widgets
  * docking: Apply the height/width dash constraint after adding to main uiGroup
  * docking: Delay toggling to group multiple requests
  * docking: Consider theming when computing the sliderContainer space
  * docking: Reimplement Clutter.BindConstraint to bind to Maximum size only
  * docking: Replace the dashSpacer instance in default controls
  * docking: Make sure we don't send the overview offscreen in extended mode
    (LP: #1834967)
  * launcherAPI: Actually keep track of the unity bus ID and replace it
    (LP: #1756837)

  [ Michele Gaio ]
  * Fix bug with xscreensaver.

  [ Jordan Christiansen ]
  * Update the screenshot to Gnome 3.34

 -- Marco Trevisan (Treviño) <email address hidden> Wed, 18 Mar 2020 03:22:28 +0100