Gnome-shell-extension-ubuntu-dock not run in the absence of a display

[kirill]

Ubuntu 18.04.3, GeForce GTX 750, Nvidia proprietary driver v390
gnome-shell-extension-ubuntu-dock - 0.9.1ubuntu18.04.3

I need the graphical environment to start without a monitor. This is necessary for testing applications.

For this, I have created a configuration /usr/share/X11/xorg.conf.d/10-nvidia.conf:

Section "Monitor"
    Identifier "Configured Monitor"
    HorizSync 5.0 - 1000.0
    VertRefresh 5.0 - 200.0
    ModeLine "1920x1080" 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +Hsync +Vsync
EndSection

Section "OutputClass"
    Identifier "nvidia"
    MatchDriver "nvidia-drm"
    Driver "nvidia"
    Option "AllowEmptyInitialConfiguration"
    ModulePath "/usr/lib/x86_64-linux-gnu/nvidia/xorg"
EndSection

Section "Device"
    Identifier "Idek Iiyama"
    Option "ConnectedMonitor" "DFP-0"
EndSection

If I turn off and turn on the computer without a connected display, then I will get a standard Gnome3 without ubuntu-dock

When booting the system, I get an error:

Aug 21 11:22:51 box gnome-shell[3417]: JS WARNING: [resource:///org/gnome/shell/ui/workspaceThumbnail.js 891]: reference to undefined property "_switchWorkspaceNotifyId"
Aug 21 11:22:51 box gnome-shell[3417]: JS WARNING: [/<email address hidden>/docking.js 1778]: reference to undefined property "_workspaceIsolation"
Aug 21 11:22:51 box gnome-shell[3417]: JS ERROR: TypeError: this._workspaceIsolation is undefined#012DockManager<._deleteDocks@/<email address hidden>/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/<email address hidden>/docking.js:1662:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
Aug 21 11:22:51 box gnome-shell[3417]: JS ERROR: TypeError: this._workspaceIsolation is undefined#012DockManager<._deleteDocks@/<email address hidden>/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/<email address hidden>/docking.js:1662:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell-extension-ubuntu-dock 0.9.1ubuntu18.04.3
ProcVersionSignature: Ubuntu 5.0.0-25.26~18.04.1-generic 5.0.18
Uname: Linux 5.0.0-25-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Wed Aug 21 12:35:20 2019
InstallationDate: Installed on 2019-05-06 (106 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
PackageArchitecture: all
SourcePackage: gnome-shell-extension-ubuntu-dock
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Daniel van Vugt (vanvugt)]

Might be related to:

https://github.com/micheleg/dash-to-dock/issues/1076
https://github.com/micheleg/dash-to-dock/issues/769
https://github.com/micheleg/dash-to-dock/issues/493