Ubuntu – Few application icons not appearing in Ubuntu Dock after upgrading to Ubuntu 17.10

17.10gnome-shelliconsterminatorubuntu-dock

After upgrading to Ubuntu 17.10, Ubuntu Dock icons of some of my apps are not appearing. They appear properly in the dash. I verified the *.desktop files for the applications in /usr/share/applications and ~/.local/share/applications.

E.g. dock icon is not displaying for "Terminator". Check out the attached image.

enter image description here

This is how the icon for the same application appears in dash search:

enter image description here

Content of /usr/share/applications/terminator.desktop:

[Desktop Entry]
Name=Terminator
Comment=Multiple terminals in one window
TryExec=terminator
Exec=terminator
Icon=terminator
Type=Application
Categories=GNOME;GTK;Utility;TerminalEmulator;System;
StartupNotify=true
X-Ubuntu-Gettext-Domain=terminator
X-Ayatana-Desktop-Shortcuts=NewWindow;
Keywords=terminal;shell;prompt;command;commandline;
[NewWindow Shortcut Group]
Name=Open a New Window
Exec=terminator
TargetEnvironment=Unity

Any pointers to debug this issue will be helpful.

Best Answer

Try this method in an Xorg session, not sure whether it would work in a Wayland session.

  1. Launch one such application, say Terminator, whose correct icon is not seen in Ubuntu Dock.
  2. Run xprop WM_CLASS in Terminal. The cursor should turn into a crosshair.
  3. Place the crosshair over Terminator and click. You should get a WM_CLASS string for Terminator.

  4. Open Terminator's .desktop file and add the following line

    StartupWMClass=OBTAINED-VALUE

    In place of OBTAINED-VALUE put a value you got from step 3 without any quotes.

  5. Save the .desktop file.

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