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How to change the GDM theme
To change the GDM (lock/login screen) theme, you need to replace the system'sdefault GNOME Shell theme.
:warning: Cautions :warning:
If the replacement fails, your desktop environment will not work properly. So please be careful if doing this.
When applying this, other third-party GNOME Shell themes would look broken until you restore to the original theme.
If GNOME Shell has been updated and restored to the original theme, you will need to install this again.
Note: On Arch Linux, you can automatically reinstall the GDM theme by creating a hook file. For example, if you use Materia-compact as your GDM theme, put this file in the
/usr/share/libalpm/hooks/directory.
Requirements
glib-compile-resources— The package name depends on the distro.glib2(Arch Linux)glib2-devel(Fedora, openSUSE, etc.)libglib2.0-dev-bin(Debian, Ubuntu, etc.)
libxml2-utils— Ubuntu users only.
Installation
Back up the original theme file(s) first. If you are already using a custom GDM theme, skip this:
`sh sudo cp -av /usr/share/gnome-shell/gnome-shell-theme.gresource{,~}
# For Ubuntu 17.10 or 18.04, you also need the following: sudo cp -av /usr/share/gnome-shell/theme/ubuntu.css{,~}
# For Ubuntu 18.10, you also need the following: sudo cp -av /usr/share/gnome-shell/theme/Yaru/gnome-shell.css{,~} `
Select a GTK theme to decide which variant to install.
Replace the default theme file(s):
`sh GTK_THEME=$(gsettings get org.gnome.desktop.interface gtk-theme | sed "s/'//g") cd /usr/share/themes/${GTK_THEME}/gnome-shell sudo glib-compile-resources --target=/usr/share/gnome-shell/gnome-shell-theme.gresource gnome-shell-theme.gresource.xml
# For Ubuntu 17.10 or 18.04, you also need the following: sudo cp -av gnome-shell.css /usr/share/gnome-shell/theme/ubuntu.css
# For Ubuntu 18.10, you also need the following: sudo cp -av gnome-shell.css /usr/share/gnome-shell/theme/Yaru/gnome-shell.css `
Uninstallation
Restore to the original theme file(s) from the backup:
`sh sudo mv -v /usr/share/gnome-shell/gnome-shell-theme.gresource{~,}
# For Ubuntu 17.10 or 18.04, you also need the following: sudo mv -v /usr/share/gnome-shell/theme/ubuntu.css{~,}
# For Ubuntu 18.10, you also need the following: sudo mv -v /usr/share/gnome-shell/theme/Yaru/gnome-shell.css{~,} `
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# How to change the GDM theme
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To change the GDM (lock/login screen) theme, you need to replace the system's _default_ GNOME Shell theme.
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## :warning: Cautions :warning:
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- If the replacement fails, your desktop environment will not work properly. So please **be careful** if doing this.
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- When applying this, other third-party GNOME Shell themes would look broken until you restore to the original theme.
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- If GNOME Shell has been updated and restored to the original theme, you will need to install this again.
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> Note: On Arch Linux, you can automatically reinstall the GDM theme by creating a [hook](https://wiki.archlinux.org/index.php/Pacman#Hooks) file. For example, if you use Materia-compact as your GDM theme, put [this file](https://gist.github.com/looselyrigorous/a1aa931ce48627cc39daccc9253b30c7) in the `/usr/share/libalpm/hooks/` directory.
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## Requirements
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- `glib-compile-resources` — The package name depends on the distro.
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- `glib2` (Arch Linux)
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- `glib2-devel` (Fedora, openSUSE, etc.)
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- `libglib2.0-dev-bin` (Debian, Ubuntu, etc.)
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- `libxml2-utils` — Ubuntu users only.
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## Installation
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1. **Back up** the original theme file(s) first. If you are already using a custom GDM theme, skip this:
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```sh
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sudo cp -av /usr/share/gnome-shell/gnome-shell-theme.gresource{,~}
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# For Ubuntu 17.10 or 18.04, you also need the following:
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sudo cp -av /usr/share/gnome-shell/theme/ubuntu.css{,~}
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# For Ubuntu 18.10, you also need the following:
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sudo cp -av /usr/share/gnome-shell/theme/Yaru/gnome-shell.css{,~}
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```
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2. Select a **GTK** theme to decide which variant to install.
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3. Replace the default theme file(s):
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```sh
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GTK_THEME=$(gsettings get org.gnome.desktop.interface gtk-theme | sed "s/'//g")
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cd /usr/share/themes/${GTK_THEME}/gnome-shell
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sudo glib-compile-resources --target=/usr/share/gnome-shell/gnome-shell-theme.gresource gnome-shell-theme.gresource.xml
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# For Ubuntu 17.10 or 18.04, you also need the following:
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sudo cp -av gnome-shell.css /usr/share/gnome-shell/theme/ubuntu.css
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# For Ubuntu 18.10, you also need the following:
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sudo cp -av gnome-shell.css /usr/share/gnome-shell/theme/Yaru/gnome-shell.css
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```
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4. Reload the theme. If you are running GNOME Shell, press <kbd>Alt</kbd> + <kbd>F2</kbd> then type `rt`.
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## Uninstallation
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1. Restore to the original theme file(s) from the backup:
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```sh
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sudo mv -v /usr/share/gnome-shell/gnome-shell-theme.gresource{~,}
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# For Ubuntu 17.10 or 18.04, you also need the following:
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sudo mv -v /usr/share/gnome-shell/theme/ubuntu.css{~,}
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# For Ubuntu 18.10, you also need the following:
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sudo mv -v /usr/share/gnome-shell/theme/Yaru/gnome-shell.css{~,}
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```
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2. Reload the theme. If you are running GNOME Shell, press <kbd>Alt</kbd> + <kbd>F2</kbd> then type `rt`.
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