LightDM – Missing Gnome Shell Icon

14.04gnomeiconslightdm

the Icon of Gnome shell is missing from lightDM.. I had to manually add Gnome Shell to lightDM because it didn't install properly on my machine. now I don't now how to add the Icon to lightDM.

Im on Ubuntu 14.04

Best Answer

In 14.04 the gnome-session package was split so that there is also an ubuntu-session package. In a standard Ubuntu 14.04 install, the gnome-session part won't be installed by default, so if you only installed gnome-shell you won't get the /usr/share/xsessions/gnome.desktop xsession file which is what LightDM reads to add the session. So the fix is:

sudo apt-get install gnome-session

In previous versions both the Unity and gnome-shell xsession files were in the same package and installed by default so you only needed to install gnome-shell.

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The pre-installed (GNOME) Calculator application on Ubuntu 18.04 is a snap application, it doesn't have .desktop launcher(s) for the application at traditional place(s), e.g. /usr/share/applications/. Check the /var/lib/snapd/desktop/applications/ directory instead.

Alternatively, you may consider creating a custom .desktop launcher for the application by hand. To do so, follow the steps below.

Create a new file, say calculator.desktop in your ~/.local/share/applications/ directory. You can do that by running the following in Terminal
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Open this file with a text-editor, for example by running
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gedit ~/.local/share/applications/calculator.desktop
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Add the following lines to this file and save the file.

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