Is it possible to use LightDM with KDE on Archlinux? Wiki says
Basically there are two ways of starting KDE. Using KDM or xinitrc.
I use also awesome WM and XFCE, so I'd like to use LightDM instead.
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Yeah man! Everything is possible with Archlinux! You can install the entire system anyway you want.
sudo pacman -S xorg xinit sudo pacman -S lightdm lightdm-kde-greeter sudo pacman -S plasma
after that you have to enable the service that control the lightdm on the boot time
sudo systemctl enable lightdm.service sudo systemctl start lightdm.service
If you are using a display manager you don't need to worry about the .xinitrc file cause the display manager is accountable for start the desktop environment that you chose.
Second, if you have an Display manager installed, like GDM, SDDM or XDM, you have to stop the service running, for example the GDM service
sudo systemclt disable gdm.service
and select the new display manager to start with the system boot
sudo systemctl enable lightdm.service
The display manager is independent of the desktop environment such as KDE or Gnome, so you can arrange the combination between display manager and desktop environment the way you want.