When using YaST to configure my tftp server, I have the option to start the
service, using the "After writing configuration" dropdown, by selecting "start"

After doing so, it still doesn't seem to work. systemctl status tftp reports:

$ systemctl status tftp       
��� tftp.service - Tftp Server
   Loaded: loaded (/usr/lib/systemd/system/tftp.service; static; vendor preset:
disabled)
   Active: failed (Result: resources)


journalctl shows:

mar 14 11:50:25 nobill-desktop systemd[1]: tftp.service: Got no socket.
mar 14 11:50:25 nobill-desktop systemd[1]: tftp.service: Failed to run 'start'
task: Invalid argument
mar 14 11:50:25 nobill-desktop systemd[1]: tftp.service: Failed with result
'resources'.
mar 14 11:50:25 nobill-desktop systemd[1]: Failed to start Tftp Server.


If I start tftp.socket and restart tftp, it seems to work fine:

$ systemctl start tftp.socket
$ systemctl start tftp
$ systemctl status tftp
��� tftp.service - Tftp Server
   Loaded: loaded (/usr/lib/systemd/system/tftp.service; static; vendor preset:
disabled)
   Active: active (running) since Thu 2019-03-14 13:03:28 WET; 5s ago
 Main PID: 21468 (in.tftpd)
    Tasks: 1 (limit: 4915)
   Memory: 208.0K
   CGroup: /system.slice/tftp.service
           ������21468 /usr/sbin/in.tftpd -u tftp -s /srv/tftpboot