{"id":46439,"date":"2024-04-30T15:46:41","date_gmt":"2024-04-30T15:46:41","guid":{"rendered":"https:\/\/ubuntuhandbook.org\/?p=46439"},"modified":"2024-06-17T07:42:47","modified_gmt":"2024-06-17T07:42:47","slug":"missing-icon-dock-ubuntu-2404","status":"publish","type":"post","link":"https:\/\/ubuntuhandbook.org\/index.php\/2024\/04\/missing-icon-dock-ubuntu-2404\/","title":{"rendered":"Fix Missing App Icon in Left Dock \/ Panel in Ubuntu 24.04"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Got app windows that do not show their icons on left (or bottom) dock panel? This tutorial may help to fix the issue in Ubuntu 24.04.<\/p>\n

App icons that you see in system app launcher are handled by .desktop<\/code> files. This kind of config file usually include a line Icon=app-icon-name<\/code>, so Ubuntu and many other Linux can find and display the icon image for the app in start menu (or application menu).<\/p>\n

If the icon file is missing from both system icons directory (usually \/usr\/share\/icons<\/code> and \/usr\/share\/pixmaps<\/code>) and user’s local icons folder (.local\/share\/icons<\/code>), then it shows universal executable icon (the gear icon with gray square background, see the image above) instead.<\/p>\n

<\/p>\n

In Ubuntu 24.04, an app (Transmission in my case) may show its app icon in the app grid and search result, when trying to launch it. Meaning the app icon file is correctly installed on your system. However, after launched the app window, Ubuntu Dock shows a gear icon instead.<\/p>\n

If you pin the app to the dock, and then launch it, then there will be 2 icons for it. One correctly displays the app icon, another displays the gear icon meaning icon file cannot found.<\/p>\n

\"\"<\/a><\/p>\n

This is because the window created by the application is not associated with the shortcut used to start the application. In Ubuntu 22.04 and earlier, you’ll get duplicated app icons on the dock. However, in Ubuntu 24.04 it falls back to the executable icon (the gear icon) instead.<\/p>\n

In this case, user can simply add StartupWMClass<\/b> string in the associated .desktop<\/code> config file, and set the value to the class name of the open windows to fix the issue.<\/p>\n

Step 1: Find out the class name of the app window<\/h3>\n

First, you need to launch and keep the app window. Then, press Alt + F2<\/b> to launch “Run a Command” dialog. When the dialog opens, type lg<\/b> and hit Enter.<\/p>\n

\"\"<\/a>
\nIt will drop-down GNOME’s integrated debugger and inspector tool from the top.<\/p>\n

In that window, click Windows<\/b> button, then find out the class name for the target app window. In my case, they are:<\/p>\n