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Asked: 2020-05-30 06:49:20 +0800 CST

How does gnome shell know which config file to use from /usr/share/gnome-shell/modes/?

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The directory /usr/share/gnome-shell/modes/ contains the following configuration files that specify which style sheet to use, from the specified gresource, for the Gnome Shell Top Bar, Dash, and Lock Screen.

initial-setup.json
ubuntu.json
yaru.json

How does gnome shell know which of these config files to use/load?

There must be a place where the names initial-setup, ubuntu, or yaru are configured?

gnome-shell

1 Answers

  1. Best Answer

    It is from the Ubuntu session which is the default at login screen.

    enter image description here

    session Name Ubuntu -> is the one /usr/share/xsessions/ubuntu.desktop

    and its contents are

    [Desktop Entry]
Name=Ubuntu
Comment=This session logs you into Ubuntu
Exec=env GNOME_SHELL_SESSION_MODE=ubuntu /usr/bin/gnome-session --systemd --session=ubuntu
TryExec=/usr/bin/gnome-shell
Type=Application
DesktopNames=ubuntu:GNOME
X-GDM-SessionRegisters=true
X-Ubuntu-Gettext-Domain=gnome-session-3.0

    Observe the line Exec= in which it is setting the environment variable

    GNOME_SHELL_SESSION_MODE=ubuntu
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