SLiM Configuration

Overview

Note

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It will be necessary to manually edit the SLiM configuration file and the X-Windows initialisation file whenever a new desktop is added or an old one is removed.

Once SLiM has been installed and enabled, it will be necessary to manually edit both the SLiM configuration file, as well as the X-Windows initialisation file, in order to actually start your installed desktop environment(s). If these files are not edited - or not edited properly - then it is likely that you will not be able to proceed any further than the login screen itself.

Editing the SLiM Configuration File

The purpose of editing this file is to add the name(s) of your installed desktop environment(s). SLiM will then pass these name(s) to the X-Windows initialisation file (.xinitrc), which in turn will actually start your desired desktop environment(s).

Open slim.conf

You will need to first open your terminal in order to edit the SLiM configuration file. The syntax of the command to do this is:

sudo [text editor] /etc/slim.conf

For example, if you wish to edit the file within the terminal using nano (a standard terminal-based text editor) then enter:

sudo nano /etc/slim.conf

Otherwise - if you have installed the full version of Manjaro (i.e. not the NET-Edition) - you may find it easier to use the pre-installed gedit text editor instead. This will open the configuration file up as a document, making it easier to read and edit. To use gedit instead, the command is:

sudo gedit /etc/slim.conf

Add Desktop Environment Names to slim.conf

Once the SLiM configuration file has been opened, it will be necessary to add the name(s) of your installed desktop(s) in order to:

• display the name(s) of your desktop(s) on the login screen - which is helpful if you want to know which one you are switching to, and
• to tell the .xinitrc file which desktop it is to start

This is undertaken in the # Available Sessions section, located towards the middle of the file. In the example below, all the available desktops have been added. The text itself has been colured in green for illustrative purposes.

# Available sessions (first one is the default).
# The current chosen session name is replaced in the login_cmd
# above, so your login command can handle different sessions.
# see the xinitrc.sample file shipped with slim sources
sessions            xfce,gnome3,kde,cinnamon,razor-qt,openbox

As illustrated, if two or more desktops are listed, they must be seperated with a comma (,). In addition, as stated, the first desktop listed will be the default. This means that if you do not choose which desktop you want on the login screen, the name of the default one will be automatically sent to the .xinitrc file. If you have also listed a name for one or more desktops that have not actually been installed, the default one will also be sent instead.

Once your amendments have been completed, save your changes and close the configuration file by:

• nano: Press CTRL and 'x' to exit, 'y' to save, and <enter> to finish, or
• gedit: Select the 'save' option and then close the window.

Editing the X-Windows Initialisation File

The .xinitrc is responsible for actually starting your installed desktop environment(s). In essence, the .xinitrc will take the name of your chosen (or only) desktop environment from SLiM, and then use that to determine which command to use to actually start it.

Open .xinitrc

You will need to first open your terminal in order to edit the X-Windows initialisation file. The syntax of the command to do this is:

sudo [text editor] ~/.xinitrc

Don't forget the dot. For example, if you wish to edit the file within the terminal using nano, then enter:

sudo nano ~/.xinitrc

Otherwise you could use the gedit text editor instead, by entering the command:

sudo gedit ~/.xinitrc

Add Desktop Environment Names and Commands to .xinitrc

Again, the purpose of editing this file is to:

• list the name(s) (or labels) of your installed desktop environment(s) from the SLiM configuration file, and
• match those name(s) with the command(s) necessary to actually start the desktop environment(s)

The key point to keep in mind is that the name(s) of the desktop(s) listed in the SLiM configuration file must be matched with those listed in the X-Windows Initialisation file. As such, it is therefore vitally important that the name of any given desktop environment is listed EXACTLY the same way in both files. This includes the use of captial and lower-case letters. Should there by any difference at all, then there will not be a match, and your chosen desktop environment will not be started. The names and commands themselves must be added after the DEFAULTSESSION= command. All the names used in the SLiM configuration file above have been listed exactly the same way here, and have been colured in green for illustrative purposes.

DEFAULTSESSION=xfce4-session

case "$1" in
     xfce) exec xfce4-session ;;
     gnome3) exec gnome-session ;;
     kde) exec startkde ;;
     cinnamon) exec gnome-session-cinnamon ;;
     razor-qt) exec razor-session ;;
     openbox) exec openbox ;;
     *) exec $DEFAULTSESSION ;;
esac

The default session has been set to xfce4 in this instance as the author's Manjaro installation came with that desktop environment pre-installed. Yours may be different, and you are entirely free to change it if you wish. The word exec means execute. Note that between the lines 'case "$1" in' and 'esac', each line starts with the name of a desktop environment, followed by the command to execute (i.e. start) that particular desktop environment. The exception is the last line which begins with an asterisk ('*'). This is to ensure that if a match is not found, then the default session will be started instead - which in this instance, is xfce4.

You can use all of the lines between 'case "$1" in' and 'esac' in the above example if you wish, even if you do not have all of these desktop environments installed. Doing so will not cause any problems, and can make life much easier in future if you decide to install a new desktop (i.e. it will only be necessary to edit the SLiM configuration file). Otherwise, delete the approptiate lines for any desktops you do not have installed.

Once your amendments have been completed, save your changes and close the configuration file by:

• nano: Press CTRL and 'x' to exit, 'y' to save, and <enter> to finish, or
• gedit: Select the 'save' option and then close the window.

Now reboot the system for the changes to take effect.

Selecting Desktop Environments in SLiM

Where two or more desktop environments have be installed - and consequently enabled by editing the above files - then they can be cycled and selected by pressing the F1 key on the SLiM login screen.