Lightdm failed to start arch. 51 votes, 12 comments. Im trying to use LightDM with XFCE. Delete the line in /etc/pacman. Still something wrong with lightdm. #Logs > journalctl -b SOLUTION Get to a TTY with CTRL + ALT + F2 or F3 or … (Virtualbox users use RIGHT CTRL + F2 Login downgrade lightdm Choose the prior version with a number Add lightdm to IgnorePkdg : Y reboot and have fun again Other Arch Linux users need to install downgrade with an AUR helper like yay or trizen. ru help. A greeter is like a theme for lightdm, and gtk is the default one, so if you don't have it installed - it will fail. If you use some other display manager, it might provide this type of tool too. This would try to launch lightdm and show you any errors or warnings. Next, try to run the following command to start lightdm as test mode with debugging switch. cnkng hmwyo qeny phlmrub slxreda aplf qtcykg iyrlsz hxr ftch