i executed sudo rm -rf /var/lib/lightdm/.cache logout and unity-greeter works until next reboot
i use standard, but non-default, wallpaper + 3 users with default one
i executed lightdm/ .cache
sudo rm -rf /var/lib/
logout
and unity-greeter works
until next reboot
i use standard, but non-default, wallpaper + 3 users with default one