calamares/src/modules/displaymanager/displaymanager.conf

# Configure one or more display managers (e.g. SDDM)
# with a "best effort" approach.
---
#The DM module attempts to set up all the DMs found in this list, in that precise order.
#It also sets up autologin, if the feature is enabled in globalstorage.
#The displaymanagers list can also be set in globalstorage, and in that case it overrides anything set up here.
displaymanagers:
  - slim
  - sddm
  - lightdm
  - gdm
  - mdm
  - lxdm
  - kdm

# Enable the following settings to force a desktop environment
# in your displaymanager configuration file. This will attempt
# to configure the given DE (without checking if it is installed).
# The DM configuration for each potential DM may **or may not**
# support configuring a default DE, so the keys are mandatory
# but their interpretation is up to the DM configuration.
#
# Subkeys of *defaultDesktopEnvironment* are (all mandatory):
#  - *executable* a full path to an executable
#  - *desktopFile* a .desktop filename
#
# If this is **not** set, then Calamares will look for installed
# DE's and pick the first one it finds that is actually installed.
#
# If this **is** set, and the *executable* key doesn't point to
# an installed file, then the .desktop file's TryExec key is
# used instead.
#

#defaultDesktopEnvironment:
#    executable: "startkde"
#    desktopFile: "plasma"

#If true, try to ensure that the user, group, /var directory etc. for the
#display manager are set up correctly. This is normally done by the distribution
#packages, and best left to them. Therefore, it is disabled by default.
basicSetup: false

#If true, setup autologin for openSUSE. This only makes sense on openSUSE
#derivatives or other systems where /etc/sysconfig/displaymanager exists.
sysconfigSetup: false