SDDM configuration ================== The program as shipped already includes default settings and does not require a configuration file to exist. For this reason there is no /etc/sddm.conf shipped in this package. There is an example configuration file in: /usr/share/doc/sddm/sddm.conf In order to override a configuration value you'll need to create a /etc/sddm.conf file and set the values accordingly (see sddm.conf(5) manpage for more details). If you use KDE, the recommended way of doing this is through KDE's System Settings (Workspace -> Startup and Shutdown). Themes ------ The theme used by default in sddm is 'debian-theme', which is configurable using the alternative 'sddm-debian-theme', this allows a better integration of sddm with different desktop environments, such as LXQt or Plasma. Currently the following packages provide a sddm-theme: * sddm-theme-maui * sddm-theme-debian-maui * sddm-theme-elarun * sddm-theme-debian-elarun * sddm-theme-maldives * sddm-theme-maya * sddm-theme-breeze * sddm-theme-debian-breeze You can easily change the one you want to use with: sudo update-alternatives --config sddm-debian-theme The themes named sddm-theme-debian-* were adapted to have the look and feel for the Debian stretch release. Also, the 0.14 version of sddm drops the 'circles' theme and it will eventually be removed from the archive. Please use a different sddm theme. HiDPI ----- There are some bugs in QT5 (#857648) that cause the QScreen object to become invalid when enabling the HiDPI support in some video cards, this caused some regressions in 0.14. To avoid this issue we are disabling the HiDPI support by default. If you want to enable it you'll need to set EnableHiDPI configuration option under the [General] section of your /etc/sddm.conf: [General] EnableHiDPI=true