Is this all the output that journalctl can produce? Running it on my system produces a number of lines including
-- Logs begin at Wed 2019-02-13 13:49:51 EST, end at Fri 2019-02-15 20:21:26 EST. --
Would you be kind enough to dump all your journalctl output? Also, the syslog might hold some more info, try
sudo grep -i wlp1s0 /var/log/syslog