Hi, there!
I just installed Arch on an RPi3, something basic, far from fancy (base system + full update + openvpn + transmission-cli). After starting transmission.service, the system issues the following error message (last line). Transmission works, though.
Happy new year!
$this->bbcode_second_pass_code('', 'Jan 09 18:22:29 <hostname> systemd[1]: Starting Transmission BitTorrent Daemon...
Jan 09 18:22:30 <hostname> systemd[1]: Started Transmission BitTorrent Daemon.
Jan 09 18:22:31 <hostname> transmission-daemon[295]: [2018-01-09 18:22:31.139] UDP Failed to set receive buffer: requested 4194304, got 327680 (tr-udp.c:84)
Jan 09 18:22:31 <hostname> transmission-daemon[295]: [2018-01-09 18:22:31.140] UDP Failed to set send buffer: requested 1048576, got 327680 (tr-udp.c:95)
Jan 09 18:22:31 <hostname> transmission-daemon[295]: [2018-01-09 18:22:31.140] Unable to save pidfile "/run/transmission/transmission.pid": No such file or directory (daemon.c:548)')