Public bug reported:

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: 
[/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/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@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/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@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/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)

** Affects: gnome-shell-extension-ubuntu-dock (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

** Attachment added: "2.png"
   https://bugs.launchpad.net/bugs/1840900/+attachment/5283659/+files/2.png

** Description changed:

  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
- ```
+ 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
+     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"
+     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"
+     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
+ 
+ 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: 
[/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/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@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/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@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1778:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/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)

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https://bugs.launchpad.net/bugs/1840900

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

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